® ONline Ethernet Bridge Module Installation and Operation Guide Document Number 17-00104-5 Printed March 1996 Model Number: 5102B-EE Software Version: 2.12 3Com Corporation 118 Turnpike Road Southborough, MA 01772-1886 U.S.A.
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iv ONline Ethernet Bridge Module Installation and Operation Guide
Contents How to Use This Guide Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv Structure of This Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xvi Document Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii Related Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xix 3Com Documents . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 2 — Installation Precautionary Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 Unpacking Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 Summarized Bridge Installation Procedure . . . . . . . . . . . . . . . . . . . . . . . 2-3 Module Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 Module Extractor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Establishing the User Password . . . . . . . . . . . . . . . . . . . . . . . . . 3-14 Configuring Other Bridge Module Parameters . . . . . . . . . . . . . 3-14 Bridge Module Name (Alias) . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15 Bridge Module Management Prompt . . . . . . . . . . . . . . . . . . . . 3-15 Contact Name and Location . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16 Terminal Timeout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 6 — Firmware Download Instructions Download Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 Download Background Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2 Download Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3 Install the ProComm Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3 Connect the RS-232 Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cable Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-6 Troubleshooting Transceiver Cables . . . . . . . . . . . . . . . . . . . . . . . . . C-6 Symptoms of Bad Transceiver Cables . . . . . . . . . . . . . . . . . . . . . C-6 Causes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-6 Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-7 RS-232 Cables . . . . . . . . . . . . . . . . . . . . .
x ONline Ethernet Bridge Module Installation and Operation Guide
Figures Figure 1-1. Figure 1-2. Figure 1-3. Figure 1-4. Figure 2-1. Figure 2-2. Figure 2-3. Figure 2-4. Figure 2-5. Figure 2-6. Figure 6-1. Figure 6-2. Figure 6-3. Figure 6-4. Figure 6-5. Figure 6-6. Figure 6-7. Figure 6-8. Figure 6-9. Figure B-1. Figure B-2. Figure C-1. Figure C-2. Bridge Module Hardware Design . . . . . . . . . . . . . . . . . . 1-7 Sample Bridge Module Configuration . . . . . . . . . . . . . . 1-10 Backplane Channel Bridged to Broadband Segment . . .
xii ONline Ethernet Bridge Module Installation and Operation Guide
Tables Table 1-1. Table 2-1. Table 2-2. Table 2-3. Table 2-4. Table 2-5. Table 2-6. Table 3-1. Table 3-2. Table 3-3. Table 4-1. Table 4-2. Table 4-3. Table 4-4. Table 4-5. Table 4-6. Table 4-7. Table 4-8. Table 5-1. Table 5-2. Table 5-3. Table 6-1. Table 6-2. Table C-1. Table C-2. Table C-3. Table C-4. Table 4-1. Packet Distribution by Bridge Module . . . . . . . . . . . . . . . 1-6 Bridge Module LEDs, Button, and Connectors . . . . . . . . . 2-5 Channel Select Dip Switch Settings . . . . . . . . . . . . .
How to Use This Guide This guide describes the architecture, principal features, operating characteristics, and diagnostic procedures of the ONline™ Ethernet Bridge Module. It also describes the controls and indicators of the Bridge Module and explains how to install and verify its operation. This guide is applicable for firmware Version 2.12 of the module.
Structure of This Guide This guide contains six chapters and four appendices: Chapter 1, Introduction – Introduces the O Nline Ethernet Bridge Module from a functional point of view and explains the front panel LEDs, button, and connectors. Chapter 2, Installation – Discusses important setup information and provides illustrated procedures for installing, configuring, and verifying the operation of the Bridge Module.
Appendix E, - Technical Support – Lists the various methods for contacting the 3Com technical support organization and for accessing other product support services.
Document Conventions The following document conventions are used in this manual: Convention Courier text Indicates Example User input In the Agent Information Form, enter MIS in the New Contact field. System output After pressing the Apply button, the system displays the message Transmitting data. Bold command string Path names Before you begin, read the readme.txt file located in /usr/snm/agents.
Convention Note: Indicates A Note. The information is important Example Note: Use STP lobe cables for your system. Caution: A Caution. A condition may damage software or hardware Caution: Do not put your installation diskettes on a magnetic surface. This may damage the diskettes. Warning: A Warning. A condition may threaten personal safety Warning: Wear eye protection when performing these maintenance procedures.
3Com Documents The following documents provide additional information on 3Com products: 17-Slot ONline System Concentrator Installation and Operation Guide – Explains how to install, operate, and manage the 3Com ONline 17-Slot System Concentrator (Models 5017C-LS and 5017C with load sharing). 6-Slot ONline System Concentrator Installation and Operation Guide – Explains how to install, operate, and manage the 3Com ONline 6-Slot System Concentrator.
1 Introduction This chapter describes the ONline™ Ethernet Bridge Module basic capabilities, operation, and system configuration alternatives. The ONline Ethernet Bridge Module is referenced throughout this manual as the Bridge Module. The Bridge Module The Bridge Module is a high-performance bridge that transparently interconnects your facility-wide Ethernet and IEEE 802.3 networks to form a single extended LAN.
❑ Monitor your extended LAN using network management features including: – Traffic counters – Diagnostic information – Address Table information Bridge Module Features The following section describes the major features of the Bridge Module.
Depending upon the type of bridge connection you select (backplane or the AUI connection), an individual port can connect to any of the following devices: – ONline System Concentrator – Ethernet transceivers – Ethernet repeaters – Other data-link bridges ONline System Concentrator You can connect to another concentrator through the AUI port or through another module that is on the same channel as the Bridge Module.
Other Bridges The Bridge Module can operate on an expanded LAN that contains other bridges under the following two conditions: 1. The other bridges must forward packets transparently at the data link layer. 2. The total end-to-end delay in the extended network must not exceed the time-out requirements of higher level protocols. 3Com does not recommend configuring the Bridge Module on networks with more than seven (7) bridge hops between any two nodes.
More information about the Spanning Tree protocol is included in Appendix B. Traffic Localization The Bridge Module is a packet store-and-forward device that receives all packets and, if necessary, forwards them from the subnetwork on one side of the bridge to the subnetwork on the other side. The Bridge Module also acts as a packet filter, filtering packets based upon local destination addresses. Filtering can isolate high traffic subnetworks from the rest of the LAN.
bridge. The Bridge looks at the source address of each packet generated on the subnetwork and creates a database containing these addresses. Note: If a node does not generate any packets, its location cannot be dynamically learned by the Bridge Module. When a packet is received by the Bridge Module, its destination address is compared with the addresses in the source subnetwork database. Table 1-1 describes what happens when a packet is received by the Bridge Module. Table 1-1.
2. It uses dedicated hardware to accelerate the address filtering operation to ensure the highest possible performance in an 802.3 to 802.3 bridge (Figure 1-1). Figure 1-1. Bridge Module Hardware Design Transparent Operation The ONline Ethernet Bridge Module operates transparently to other stations on the LAN, therefore no special software is required on any other station. This means an extended LAN using Ethernet Bridge Modules can support any protocol that runs over IEEE 802.
Downloadable Firmware As firmware upgrades become available from 3Com, you can download this new firmware to your Bridge Module using an IBM-compatible PC connected to the module's RS-232 serial port. Downloadable firmware ensures that you have access to new features as soon as possible - saving the cost, time, and inconvenience of installing new PROM chips. This feature is explained in detail in Chapter 6, Firmware Download Instructions.
This version of the Bridge Module software also provides SNMP (Simple Network Management Protocol), which allows the bridge to be managed from a SNMP-based network management workstation. The Bridge Module offers capabilities to help manage your extended LAN. The primary categories of management functions are: 1. Bridge and Network Status Reporting 2. Network Statistic Collection and Reporting 3.
Figure 1-2. Sample Bridge Module Configuration Caution: If your extended LAN includes protocol-specific routers, make sure the total number of routers in the extended LAN does not exceed the maximum allowed by the protocol for a single LAN.
Figure 1-3. Backplane Channel Bridged to Broadband Segment Backplane Connections When you bridge two channels using the backplane as both port 1 and port 2, the maximum distance between two end-node devices can be 8000 meters (4000 m on each side of the bridge). This type of configuration is shown in Figure 1-4.
Figure 1-4. Backplane Channels Bridged Together Diagnostics and Self-Test On power-up, the Bridge Module performs the following diagnostic tests: ❑ Bridge self-tests ❑ CRC check of code memory (Flash EPROM) ❑ Port loopback tests These tests allow the Bridge Module to check its own circuitry and communication interfaces to verify its ability to send and receive data. If the bridge fails any of the diagnostics, the front panel LEDs indicate an error code.
2 Installation This chapter describes the precautionary, unpacking, and installation procedures for the Bridge Module. It also provides illustrations of the module and describes the front panel indicators, button, and connectors.
❑ Do not remove the board from its anti-static shielding bag until you are ready to inspect it. ❑ Handle the board by the faceplate only. Use proper grounding techniques when you install the Bridge Module. These techniques include using a foot strap and grounded mat or wearing a grounded static-discharge wrist strap. An alternate method is to touch a grounded rack or other source of ground just before handling the module.
Summarized Bridge Installation Procedure The following list summarizes the procedure for installing and operating the Bridge Module. ❑ Plug the Bridge Module into the ONline System Concentrator with the loopback connector attached to the AUI port and verify internal diagnostics. ❑ Once the Bridge Module passes diagnostics, pull it back out of the concentrator and set the dip switches to the two channels you want to bridge (or set these values through network management without removing the module).
Module Front Panel The front panel has eight indicators (LEDs), one button, two connectors, and the module extractor. The front panel indicators inform you of the operating state of your Bridge Module. Figure 2-1 shows the Bridge Module front panel and Table 2-1 lists the function of each LED, button, and connector on the module faceplate. PORT 1 PORT 2 RX TX FWD MGMT TEST RESET Reset Button AUI Female AUI Port RS-232 SERIAL PORT RS-232 Serial Port Module Extractor Figure 2-1.
Just pull the extractor lever down to remove the module from the concentrator. Table 2-1. Bridge Module LEDs, Button, and Connectors Label Function RX Indicates receive activity on the IEEE 802.3 or Ethernet network connected to that port. TX Indicates transmit activity on the IEEE 802.3 or Ethernet network connected to that port. FWD Indicates that the bridge is in forwarding state and is sending packets from that port. MGMT Indicates that administrator mode of the bridge is currently active.
Dip Switches The Bridge Module has one dip switch component with 4 switches, located on the larger of the two boards on the module. The switches on this dip switch enable you to set the channels that are to be bridged together. Figure 2-2 shows the location and factory settings of the dip switch on the module.
Channel-Select Switch Settings All ONline media modules are equipped with the technology to work with the ONline System Concentrator's unique TriChannel Architecture. This architecture lets you assign the module to any of three channels on the ONline System Concentrator backplane. Refer to Chapter 1 in the ONline System Concentrator Installation and Operation Guide for a complete discussion of ONline's TriChannel Architecture.
Related Features The following sections describe functions that allow you to: ❑ check the module's channel assignment and LED functionality ❑ remotely manage the Bridge Module from another device LED and Channel Verification The ONline Controller Module is equipped with an LED check button on the front panel. The LED check button has two functions: it causes all LEDs in all modules in the concentrator to light, and it causes each module to identify the channel to which it is assigned.
Remote Network Management The ONline Ethernet Management Module (EMM) and ONline Token Ring Management Module (TRMM) provide remote network management capabilities for the ONline System Concentrator and its modules. These management modules also have the ability to override the channel-select dip switches on the Bridge Module. Refer to the appropriate ONline Management Module Installation and Operation Guide for additional information on network management features.
Pre-Installation Test When you install the Bridge Module into the concentrator, the unit performs a self-test to verify proper operation of the internal hardware and communication interfaces. To test the unit independently of network activity, follow these steps prior to plugging the module into the concentrator: 1. Install the provided Ethernet loopback connector to the AUI port on the module as shown in Figure 2-3. Figure 2-3. Connecting Loopback Connector 2.
Figure 2-4 shows the installation of the Bridge Module. Figure 2-4. Installing the Bridge Module 4. Fasten the three spring-loaded screws on the front of the Bridge Module faceplate to the concentrator with your fingers to provide ground - do not overtighten. As the Bridge Module performs its internal diagnostics, the Test LED on the front panel remains lit. Various LED combinations appear during the self-test.
Note: The loopback connector must be attached to the AUI port or the self-test will not function properly. Table 2-4. Power-Up Problem Resolution Problem All indicators are off Possible Solutions Verify that the concentrator is receiving power. Press the LED/Channel Check button on the ONline Controller Module to check if the LEDs light. Pull the Bridge Module out using the module extractor and re-insert it into the concentrator. The Test LED is blinking Your unit failed the power-up self-test.
Connecting a Terminal You access Bridge Module management through the management interface - the RS-232 port on the front of the module. You can connect any device that presents an ASCII asynchronous interface, including terminals, PCs capable of terminal emulation, and modems. Note: If the concentrator has an installed network management module, you can use the REMOTE_ LOGIN command to link to the Bridge Module to perform bridge management.
Once you have configured your terminal to match the factory defaults of the Bridge Module, you can connect a cable from the terminal to the RS-232 port on the Bridge Module. Connecting to the Bridge Module RS-232 Port The RS-232 cable connects to the management interface on the Bridge Module front panel. Table 2-6 defines general cabling guidelines that apply for connecting various devices to the management interface.. Table 2-6.
2. Plug the transceiver cable into the jack. 3. Firmly push the slide latch down until it snaps into the locking position. 4. Gently pull on the connector to make sure the latch is secure. 3Com recommends strain relief for this cable to avoid placing undue stress on the connector. AUI RS-232 SERIAL Figure 2-5.
2. Set the address filtering attributes (hard-coded addresses that are not to be forwarded to, or that should always be forwarded to) using the SET FILTER command. At this time you should also set any other bridge settings that need to be changed before actually setting the channels to bridge, such as Spanning Tree parameters. 3. The default setting is for the Bridge Module to configure the channels from the dip switch settings at startup and when rebooted.
c. If you do not have a terminal connected to either the Bridge Module or to a management module, slide the module out from the concentrator (using the module extractor) and manually set the dip switches on the board to bridge two channels. Refer to Table 2-2 and Figure 2-2 in this chapter for an explanation of the dip switch settings. 5. Verify that the bridge is working properly by viewing the TX and RX LEDs.
Confirming Bridge Operation You confirm operation of the Bridge Module by sending packets between two Ethernet or two IEEE 802.3 nodes on separate subnetworks. Here are some suggested ways of doing this depending on your application: ❑ If your application uses MS-DOS networking software such as Digital Equipment's DECnet™-DOS or PCSA, Novell's NetWare, or 3Com's 3+, simply issue a DOS command when logged into your server directory.
3 ManagementFunctions This chapter shows you how to get started once you have installed the Bridge Module in your concentrator and also explains the management capabilities of the Bridge Module.
Using Bridge Management This section explains how to access Bridge Management, enter and edit commands, get help, view, modify, and save parameters. This section also describes how to display status information about your network and your Bridge Module. Note: Bridging software enables you to execute Management commands regardless of bridging activity. Therefore, bridging performance will be affected for the duration of the command execution.
Table 3-1. Command Line Key Functions Key Function [BS] or [Backspace] Moves the cursor back one character and deletes that character. [DEL] or [Delete] Same as Backspace. [ENTER] Enters the command. [SPACE] Completes a command through command completion. [CTRL-C] Returns to a blank command line (management prompt) at any time. [CTRL-R] Retypes the previous command string on the command line. ? Displays the available commands or command options.
entering the letter S followed by [SPACE] is not sufficient for Bridge Management to determine which command you are issuing because there are three commands that start with S - SAVE, SET, and SHOW. Getting Help The HELP command displays a screen of general information on using Bridge Management. For example, type help at the command line, press [ENTER], and the following screen of help information displays.
Examining Parameters The SHOW command lists the current value of any parameter you specify. For example, the SHOW SPANTREE command displays the current spanning tree parameters, as shown below.
Modifying Parameters Parameter values are stored in non-volatile memory on the Bridge Module. Your Bridge Module unit is shipped from the factory with specific default parameter values. Some of the default parameter settings are shown on the previous page in the example explaining the SHOW DEVICE command. Use the SET command to modify parameter values. You must first type the administrator password when you log in to the management interface.
❑ Filter ❑ Spantree ❑ Terminal When you make configuration changes using the SET command, these changes are effective immediately but are not saved permanently. You must issue the SAVE command to keep the new configuration values. Only saved values are in effect upon reset of the module or concentrator. Note: If a power failure occurs within the concentrator, all unsaved parameter values are lost.
Table 3-2. Procedures for Getting Started (Continued) Procedure Command Priority ❑ Set user passwords SET DEVICE PASSWORD USER Recommended ❑ Set the Bridge SET DEVICE NAME SET TERMINAL PROMPT SET DEVICE LOCATION SET DEVICE CONTACT Recommended SET TERMINAL TIMEOUT Recommended SET DEVICE IP_ADDRESS SET COMMUNITY SET DEVICE DEFAULT_GATEWAY SET DEVICE SUBNET_MASK SET ALERT Mandatory if you plan to manage via SNMP or use the PING command 4. Configure Spanning Tree Parameters SET SPANTREE...
Bridge Management Parameter Overview Bridge Management parameters fall into five general categories: ❑ Management Interface ❑ Remote Management ❑ Bridge Module Operation and Performance (Configuration) ❑ Filtering ❑ Statistics The categories and specific parameters are discussed in the following sections. All commands, arguments, and parameters are listed with examples in Chapter 4.
These parameters settings include the terminal's baud rate, data bits, parity, and stop bits. For example, the BAUD parameter determines the baud rate at which the RS-232 Bridge Management interface receives and transmits data. Note: If you need to set the module baud rate to a rate slower than 9600 baud, use a terminal set to 9600 baud to first change the value. Once you change the baud rate for the module, the terminal loses the connection to the bridge because it is now set to a different speed.
Once you have configured your terminal to match the factory defaults of the Bridge Module, press [ENTER] and the following header and password prompt are displayed: copyright 1992 Chipcom Corporation ONline Bridge Module (v2.x) Press [ENTER] and the Password prompt is displayed. Password: [ENTER] Initially the default password is a null string. You must enter a password within 10 seconds of receiving the Password: prompt or the terminal will display “Password timed out”.
Note: Terminal values you set using the SET command are not saved permanently until you issue the SAVE TERMINAL command. Once the values are saved, if you log out or even if the power fails, the saved values are retained. Automatic Modem Hangup If you use a modem to connect to the Bridge Module, you may want to use the SET TERMINAL HANGUP command to hang up the modem connection automatically when you log out of the Bridge Module. The factory default is disable, which does not automatically hang up a modem.
Use the SET DEVICE command to modify passwords. Both the administrator and the user passwords can contain up to 15 characters. Alphanumeric and special characters are allowed, including [DEL] and [BS]. The Bridge Module has two levels of password control: 1. Administrator Password - the administrator password providesaccess to all Bridge Module commands, enabling both read and write configuration access. 2.
Establishing the User Password Use the SET DEVICE PASSWORD USER command at the management prompt to establish a user password. Note that you must be logged in as the administrator to change the user password. OEBM> set device password user [ENTER] Enter current administrator password: New password: [ENTER] Verify: [ENTER] [ENTER] User password changed.
Bridge Module Name (Alias) To make communication with your remote Bridge Modules easier, we recommend that you assign a unique name to each Bridge Module. You can then use this name (instead of the IP address or Ethernet MAC address) to reference the appropriate Bridge Module. In this manner you can log into a remote Bridge Module by issuing the REMOTE_LOGIN NAME command. Use the SET DEVICE NAME command to assign a unique name to your Bridge Module.
Contact Name and Location You should enter the name of an appropriate service contact and the concentrator location at this time to provide a handy reference should there be a network problem. Use the SET DEVICE LOCATION and SET DEVICE CONTACT commands to identify the location of the Bridge Module and the name of the person responsible for the Bridge Module.
Setting SNMP Values If you plan to manage the Bridge Module through an SNMP workstation you must set the following attributes: ❑ IP Address ❑ Community Table ❑ Default Gateway ❑ Subnetwork Mask ❑ Alerts IP Address To manage via SNMP, every device on your network must have a unique IP address. Use the SET DEVICE IP_ADDRESS command to assign unique IP addresses to your Bridge Module ports. The following example shows the command to assign an IP address to port 1 of the Bridge Module.
Default Gateway The default gateway is the IP address of the gateway that will receive and forward packets whose addresses are unknown to the local network. The default gateway is useful when sending Bridge Module alert packets to a manager workstation that is on a different network. For example, the following command specifies the gateway with the address 195.24.25.36 to be used as the default gateway for port 2 of the Bridge Module. OEBM> set device default_gateway_port2 195.24.25.
Remote Management Remote Management is used to set and view parameter values for a remote Bridge Module, Midnight Bridge, or network management module. Once you are connected to a local bridge, you initiate remote management by issuing the REMOTE_LOGIN command, naming the remote device or IP address to which you want to connect, and specifying port 1 or port 2. Note that issuing the REMOTE LOGIN command will affect bridging performance for the duration of the remote connection.
AGEING_TIME The AGEING_TIME parameter tells the Bridge Module when to “age out” (automatically remove) addresses from the dynamic filtering table (default ageing period is 5 minutes). Once you set this value, the bridge will remove addresses from the table when the node with the specific address fails to transmit for the age period. For example, the command below would age out an address once it was inactive for 17 minutes.
When attached to a subnetwork, the Bridge Module dynamically learns the addresses of the nodes on the subnetwork. The Bridge Module looks at the source address of each packet generated on the subnetwork and creates the dynamic filter table from these addresses. When a packet is received by the Bridge Module, its destination address is compared to the addresses in the dynamic filter table.
Statistics Parameters Bridge Management statistics provide useful information regarding traffic loading and error conditions. The following commands are used to display, monitor, and clear statistics: ❑ SHOW ❑ MONITOR ❑ CLEAR These commands are discussed briefly in the following paragraphs. Chapter 4 provides complete description and examples of these commands. SHOW The SHOW command displays current bridge attributes. You must use one of the SHOW command parameters to display bridge attributes.
The MONITOR command will, by default, monitor the bridge statistics and use a time value of 5 minutes if you press [ENTER] instead of inputting a time and an option in the command line. Note that when executing the MONITOR command, bridging performance will be affected for the duration of the command. To minimize this impact, use the default value. CLEAR The CLEAR command resets statistics and fatal-error registers associated with the SHOW and MONITOR commands to zero.
If you have made changes and you have not saved these changes, LOGOUT prompts you as follows: OEBM> logout [ENTER] WARNING: Save unsaved changes before logout. OEBM> You must either SAVE or REVERT the changes you made to the system before you will be able to log out of the system.
4 Management Commands This chapter provides a complete alphabetized listing of the ONline Ethernet Bridge Module commands. Each command description includes examples of command usage and their results. Table 4-1, beginning on page 4-3, is a reference chart of the commands, their parameters, and the page where they can be found. Note that the Bridge Module software enables you to execute Management commands regardless of bridging activity.
A variable that requires specific user input is indicated by lower case text surrounded by curly brackets. For example, {new password}. When you type in the variable, do not include the angle brackets as part of the variable string . [ENTER] refers to a carriage return. Typing a '?' at the end of a command line will list the possible completions for that command and then redisplay the command line.
Command Summary Table 4-1 displays a summary of Bridge Module commands, their parameters, and the page number where they are located in this chapter. This list is compiled by command type: General, Configuration, Status, Statistics, Maintenance, and Special. It is important to note that there are specific Bridge Module commands that must be used with caution. If used improperly, these commands have the potential to disrupt the network. These commands are marked in Table 4-1 with an asterisk (*).
Table 4-1.
Table 4-1.
Table 4-1.
Table 4-1. Bridge Module Command Index (Continued) Command Type Status (continued) Statistics Command SHOW COUNTER (cont.
Table 4-1.
? Use the ? command to list the available Bridge Module command choices and parameter options. Format ? {command} ? Parameters none Example The following command displays the list of Bridge Module commands available under the administrator password. Note that the ? character does not display on the screen when typed, but is shown in the examples for clarity.
Example The following command displays the list of Bridge Module commands available under the user password. Note that the ? character does not display on the screen when typed, but is shown in the examples for clarity. OEBM> ? [ENTER] Possible completions: help logout monitor ping remote_login show Example As shown below, you can use the ? command to view the available parameters for a command, as illustrated for the SAVE command.
CLEAR COMMUNITY Use the CLEAR COMMUNITY command to clear an entry from the community table. This command is only available in administrator mode. Format CLEAR COMMUNITY {community number} Parameters {community number} = 1 - 10 or all Example OEBM> clear community 3 [ENTER] Community 3 cleared Description The CLEAR COMMUNITY command enables you to clear an entry in the community table.
CLEAR COUNTER Use the CLEAR COUNTER command to clear all counters or a specific statistical counter. This command is only available in administrator mode. Format CLEAR COUNTER {counter type} Parameters {counter type} = all bridge ports protocols spantree Example OEBM> clear counter bridge [ENTER] Done Description The CLEAR COUNTER command enables you to clear all counters or a specific statistical counter.
CLEAR FILTER Use the CLEAR FILTER command to clear an entry from the protocol id table or the static address table. This command is only available in administrator mode. Format CLEAR FILTER {parameter} {variable} Parameters {parameter} = protocol_id_table {protocol type} static_address_table {MAC address} Example OEBM> clear filter protocol_id_table 0800 [ENTER] Protocol ID deleted from filter table. Do SAVE FILTER and RESET DEVICE to use changes.
CLEAR LAST_ERROR Use the CLEAR LAST_ERROR command to clear the file that contains information on the last fatal error that occurred at the Bridge Module. This command is only available in administrator mode. Format CLEAR LAST_ERROR Parameters none Example OEBM> clear last_error [ENTER] Last fatal error cleared Description The CLEAR LAST_ERROR command clears the file that contains information on the last fatal error that occurred at the Bridge Module.
FORCE Use the FORCE command to override the current Bridge Module administrator password. It should only be used in the case when the password was illegally changed or forgotten. The FORCE command can only be entered at the login prompt. Format FORCE Parameters none Description The FORCE command enables you to force the administrator password back to its factory default (carriage return). This command can only be used at the login password prompt.
If either response to the LED interpretation prompts is incorrect or you exceed the 30 second time limit, the bridge displays the message “Access Denied” and performs a reset with the current administrator password retained. You will then need to repeat the FORCE command to retry the LED interpretation.
successfully interpret the first LED pattern, a second pattern is displayed which you must also interpret. If you successfully interpret the second pattern, the bridge will reboot. At the Password: prompt you will be able to press carriage return to access administrator mode of the bridge. As an example, the front panel LED sequence for the first illustration on the previous page translates into 01011111, which is 5f in hexadecimal notation.
HELP Use the HELP command to get information concerning the meaning of the commands. The HELP ? command will display a list of possible completions for the HELP command. When in user mode, this list will only contain the possible completions that a user may enter. When in administrator mode, this list will contain all possible command completions.
ping remote_login reset * revert * save * set * show Help provides useful information to remind a knowledgeable user of the meaning of the commands. The commands with an asterisk are administrator commands only. Example OEBM> help Chipcom [ENTER] Southborough Office Park 118 Turnpike Road Southborough, MA 01772-1886 To call Chipcom Customer Support in the United States, call 800-228-6840 between the hours of 8:30 am and 5:00 pm, Eastern Time.
Completion List A completion list displays a list of available choices with which to complete a command line. A completion list is obtainable at any point by typing “?.
LOGOUT Use the LOGOUT command to end a local or remote login session. Format LOGOUT Parameters none Example Logging out from a local Bridge Module: OEBM> logout [ENTER] Bye Description If you are logged into the local Bridge Module (the Bridge Module to which the terminal is connected), issuing the LOGOUT command ends the session. If you are logged into a remote Bridge Module or other device (e.g.
MAINTAIN Use the MAINTAIN command to enter maintenance mode. Maintenance mode allows you to download new software to the Bridge Module through the DOWNLOAD command. This command is only available in administrator mode. Format MAINTAIN {parameter} Parameter {parameter} = download out_of_band Example OEBM> maintain download out_of_band [ENTER] If you are sure you want to perform a download, you must enter the DOWNLOAD command again within 10 seconds. Otherwise, the download sequence will be aborted.
Description The MAINTAIN DOWNLOAD OUT_OF_BAND command enables you to download new software to the Bridge Module via the terminal port. Note that you cannot enter the MAINTAIN command if you are connected to a remote Bridge Module through the REMOTE_LOGIN command. The DOWNLOAD command will erase your current operational code. You will need the following items to replace the software: 1. 3Com Firmware Distribution Kit (part number 5000-FDK) 2.
MONITOR Use the MONITOR command to periodically display statistical information. The statistics are reported periodically based upon the time that you request. The MONITOR command parameter displays are the same as the SHOW command parameter displays, except that the MONITOR displays are updated based upon the time you request. Refer to the SHOW command section for explanations of the displays.
Active Hello Time Active Forward Delay Active Listen Time 2 15 20 Press CTRL-C to exit. Example This example displays protocol statistics every 30 seconds. OEBM> monitor 0:30 protocols 3658 Seconds Since Clear Unicast Packets Received Non-Unicast Packets Received Unicast Packets Transmitted Non-Unicast Packets Transmitted [ENTER] Port 1 0 0 0 0 Port 2 0 0 0 0 Press CTRL-C to exit.
PING Use the PING command to verify whether a device is active. Note that while executing the PING command, bridging performance will be affected for the duration of the command. Format PING {device name} {number of packets} Parameters {device name} = ip_address {Internet Protocol address} name {name of the device} {number of packets} = 1 - 255 (default is 1 packet) Example Verify whether the device with the IP address (Internet Protocol address) 1.2.3.
REMOTE_LOGIN Use the REMOTE_LOGIN command to log into any remote Bridge Module or other manageable 3Com device on the network and manage it from the local terminal. Note that while executing the REMOTE_LOGIN command, bridging performance will be affected for the duration of the command.
Description Use the REMOTE_LOGIN command and the address or name of the remote Bridge Module (or other manageable 3Com device) to which you want to connect. You must be connected, via a terminal, to a local Bridge Module before you can issue this command. Once you are connected to the remote device, you must enter the correct password for that device. From that point on, all the commands you issue are for that device.
RESET DEVICE Use the RESET DEVICE command to reset the Bridge Module. This command is only available in administrator mode. Format RESET DEVICE Parameters none Example OEBM> reset device [ENTER] Resetting device Description The RESET DEVICE command resets the Bridge Module. The setting for the diagnostics parameter determines whether diagnostics will execute during a reset. Use the SHOW DEVICE command to display the diagnostic parameter setting.
REVERT Use the REVERT command to return to the configuration settings that were in effect as of the last save. This command is only available in administrator mode.
Description The REVERT command allows you to return to the last configuration value settings saved. For example, if you specify REVERT ALERT, any SET ALERT changes you made (after the last SAVE ALERT) are cancelled. In addition, REVERT ALERT only affects the ALERT parameter - all other groups are unchanged. Values affected by this command are those associated with the SET ALERT command.
SAVE Use the SAVE command to save the current configuration values established by the SET command. These configurations are saved in non-volatile EEPROM memory. This command is only available in administrator mode.
Description Parameter values established by the SET command are effective immediately but are not automatically saved. Use the SAVE command to permanently save these values. Only saved values are in effect upon reset. Issuing the SAVE ALL command saves all of the latest bridge configuration values established by the SET command for Alert, Bridge, Community, Device, Filter, Spantree, and Terminal parameters.
SET Use the SET command to change alert, bridge, community, device, spantree, and terminal attributes. The SET command requires a parameter to set specific attributes. This command is only available in administrator mode. Format SET {parameter} Parameters {parameter} = alert bridge community device spantree terminal Description The SET command enables you to change attributes for the alert, bridge, community, device, spantree, and terminal parameters. To save changes in EEPROM memory, use the SAVE command.
SET ALERT Use the SET ALERT command to enable or disable the notification of an alert statement (trap) from this Bridge Module to the designated trap receiver (SNMP workstation).
authentication - when a user tries to access the Bridge Module and the IP Address of their workstation or device is not listed in the community table with the proper access (i.e., read_only, read_write). change - when any configuration or change is made to this concentrator. hello - when an existing Bridge Module is reset in the concentrator.
SET BRIDGE Use the SET BRIDGE command to change the bridge specific configuration parameters. Format SET BRIDGE {parameter} Parameters {parameter} = ageing_time channel dip_configuration side_switch_mode Description The SET BRIDGE command enables you to change the bridge configuration. The SET BRIDGE command parameters have parameters of their own. The following pages describe these parameters in detail.
SET BRIDGE AGEING_TIME Use the SET BRIDGE AGEING_TIME command to set the rate at which addresses are aged out of the dynamic filtering table. Format SET BRIDGE AGEING_TIME {parameter} Parameter {parameter} = 1 - 16,666 minutes (default is 5 minutes) Example The following example SETs the bridge ageing_time parameter to 17 minutes.
SET BRIDGE CHANNEL Use the SET BRIDGE CHANNEL command to select the two channels you want to bridge. Note that this command must be used with caution. If used improperly, it has the potential to disrupt the network.
SET BRIDGE DIP_CONFIGURATION Use the SET BRIDGE DIP_CONFIGURATION command to determine whether the channels to which the Bridge Module is configured are read from the dip switch settings or from memory when the Bridge Module is reset or rebooted. Note that this command must be used with caution. If used improperly, it has the potential to disrupt the network.
SET BRIDGE SIDE_SWITCH_MODE Use the SET BRIDGE SIDE_SWITCH_MODE command to enable or disable the Bridge Module's ability to detect when an Ethernet address in the address table has switched from one port to the other.
SET COMMUNITY Use the SET COMMUNITY command to create an entry in the community table. Format SET COMMUNITY {community} {IP Address} {access} Parameters {community} = {community name} or all {IP Address} = {IP Address} or all {access} = trap, read_write, read_trap, read_only, or all All three of the parameter variables are required in the SET COMMUNITY command line. Example The following example creates the community table entry called admin and specifies that the associated workstation (with IP address 2.
Example The following example creates the community table entry called ncs and specifies that all traps be sent to the IP address 1.2.3.4. OEBM> set community ncs 1.2.3.4 trap [ENTER] Community set Description The SET COMMUNITY command enables you to create a new entry in the community table. Each community is granted the access you specify in the {access} parameter in the SET COMMUNITY command line.
SET DEVICE Use the SET DEVICE command to change the Bridge Module device configuration parameters. Format SET DEVICE {parameter} Parameters {parameter} = contact default_gateway_port1 default_gateway_port2 diagnostics ip_address_port1 ip_address_port2 location name password sqe_mode subnet_mask_port1 subnet_mask_port2 Description The SET DEVICE command enables you change the Bridge Module configuration parameters. To make changes permanent, issue the SAVE DEVICE command.
SET DEVICE CONTACT Use the SET DEVICE CONTACT command to enter contact information, such as service contact's name, company, and telephone number. Format SET DEVICE CONTACT Parameter none Example OEBM> set device contact [ENTER] Enter one line of text: > Network Administrator x3658 [ENTER] Contact changed Description The SET DEVICE CONTACT command enables you to enter contact information, such as service contact's name, company, and telephone number. Enter the command and press [ENTER].
SET DEVICE DEFAULT_GATEWAY_PORT1 Use the SET DEVICE DEFAULT_GATEWAY_PORT1 command to set the IP address of the gateway that should be used when port 1 on the Bridge Module does not recognize the receiver address on the local network. Format SET DEVICE DEFAULT_GATEWAY_PORT1 {IP address} Parameter {IP address} = n.n.n.n Example OEBM> set device default_gateway_port1 1.2.3.
SET DEVICE DEFAULT_GATEWAY_PORT2 Use the SET DEVICE DEFAULT_GATEWAY_PORT2 command to set the IP address of the gateway that should be used when port 2 on the Bridge Module does not recognize the receiver address on the local network. Format SET DEVICE DEFAULT_GATEWAY_PORT2 {IP address} Parameter {IP address} = n.n.n.n Example OEBM> set device default_gateway_port2 1.2.3.
SET DEVICE DIAGNOSTICS Use the SET DEVICE DIAGNOSTICS command to enable or disable diagnostics during start-up (or reboot) of the Bridge Module. Refer to the RESET DEVICE command description for more information about the purpose of the Diagnostics parameter.
SET DEVICE IP_ADDRESS_PORT1 Use the SET DEVICE IP_ADDRESS_PORT1 command to set the Internet Protocol address for port 1 on the Bridge Module. Note that this command must be used with caution. If used improperly, it has the potential to disrupt the network. Format SET DEVICE IP_ADDRESS_PORT1 {IP address} Parameter {IP address} = n.n.n.n Example OEBM> set device ip_address_port1 145.36.17.
SET DEVICE IP_ADDRESS_PORT2 Use the SET DEVICE IP_ADDRESS_PORT2 command to set the Internet Protocol address for port 2 on the Bridge Module. Note that this command must be used with caution. If used improperly, it has the potential to disrupt the network. Format SET DEVICE IP_ADDRESS_PORT2 {IP address} Parameter {IP address} = n.n.n.n Example OEBM> set device ip_address_port2 145.36.17.
SET DEVICE LOCATION Use the SET DEVICE LOCATION command to describe the physical location of the ONline System Concentrator in which the Bridge Module is installed. Format SET DEVICE LOCATION Parameters none Example OEBM> set device location [ENTER] Enter one line of text: > Type in the physical location of your concentrator. > Third floor Eng.
SET DEVICE NAME Use the SET DEVICE NAME command to assign the Bridge Module a name that can be used to identify it in addition to its IP address. Format SET DEVICE NAME {device name} Parameter {device name} = name up to 31 characters Example OEBM> set device name OEBM3 [ENTER] Device name changed Description The SET DEVICE NAME command enables you to assign the Bridge Module a name that can be used to identify it in addition to its IP address.
SET DEVICE PASSWORD Use the SET DEVICE PASSWORD command to establish administrator and user passwords for the Bridge Module. Format SET DEVICE PASSWORD {group} Parameters {group} = administrator user Example OEBM> set device password administrator [ENTER] You are prompted as follows: Enter current administrator password: current password [ENTER] New password: new password Verify: new password [ENTER] [ENTER] Administrator password changed.
The administrator password gives the system administrator access to all of the Bridge Module commands. The user password provides access to commands that do not modify any bridge values or parameters, such as those that allow the user to view status, get help, and logout. Note that the new passwords are effective immediately. You must issue the SAVE DEVICE command for the new passwords to be permanently saved.
SET DEVICE SQE_MODE Use the SET DEVICE SQE_MODE command to display SQE (heartbeat) failures on the output from the MONITOR and SHOW commands. Format SET DEVICE SQE_MODE {parameter} Parameters {parameter} = normal (default) ignore Example OEBM> set device sqe_mode ignore [ENTER] SQE Mode parameter changed Description The SET DEVICE SQE_MODE command enables you to display SQE (heartbeat) failures on the output from the MONITOR and SHOW commands.
SET DEVICE SUBNET_MASK_PORT1 Use the SET DEVICE SUBNET_MASK_PORT1 command to specify the subnetwork mask for your type of Internet class. Format SET DEVICE SUBNET_MASK_PORT1 {mask} Parameters {mask} = 4-byte hex address Example OEBM> set device subnet_mask_port1 FF.FF.FF.0 [ENTER] Device subnet mask changed. Description The SET DEVICE SUBNET_MASK_PORT1 command enables you to specify the subnetwork mask for your type of Internet class.
SET DEVICE SUBNET_MASK_PORT2 Use the SET DEVICE SUBNET_MASK_PORT2 command to specify the subnetwork mask for your type of Internet class. Format SET DEVICE SUBNET_MASK_PORT2 {mask} Parameters {mask} = 4-byte hex address Example OEBM> set device subnet_mask_port2 FF.FF.FF.0 [ENTER] Description The SET DEVICE SUBNET_MASK_PORT2 command enables you to specify the subnetwork mask for your type of Internet class.
SET FILTER Use the SET FILTER command to add a protocol ID to the protocol ID table, set the mode of the protocol ID table, and add an address to the static address table. The SET FILTER commands are only available in administrator mode.
SET FILTER MODE PROTOCOL_ID_TABLE Use the SET FILTER MODEPROTOCOL_ID_TABLE co mmand to set the mode in which entries of the protocol id table will be used. Format SET FILTER MODE PROTOCOL_ID_TABLE {mode} Parameters {mode} = disable (default) filter forward Example This example sets the protocol ID table to filter mode.
SET FILTER PROTOCOL_ID_TABLE Use the SET FILTER PROTOCOL_ID_TABLE command to add a protocol ID to the protocol id table. Format SET FILTER PROTOCOL_ID_TABLE {protocol ID} Parameter {protocol ID} = protocol ID in hex notation Example This example adds the protocol value 08-00, which is the DoD Internet (TCP/IP), to the protocol id table.
SET FILTER STATIC_ADDRESS_TABLE Use the SET FILTER STATIC_ADDRESS_TABLE command to add node addresses to the static address table. Format SET FILTER STATIC_ADDRESS_TABLE {variable} {MAC address} Parameters {variable} = always_forward never_forward_to_port1 never_forward_to_port2 {MAC address} = XX-XX-XX-XX-XX-XX Example OEBM>set filter static_address_table never_forward_to_port1 [ENTER] Enter MAC Address: 03-00-06-07-17-01 [ENTER] Address added to filter table.
Never_Forward_To_Port1 Parameter Specifying the Never_Forward_To_Port1 parameter with a subsequent MAC address will result in all frames received at port 2 of the Bridge Module with the specified MAC address as the destination address being discarded by the Bridge Module rather than being bridged to port 1.
SET SPANTREE Use the SET SPANTREE command to change the Spanning Tree configuration parameters of the local Bridge Module. Format SET SPANTREE {parameter} Parameters {parameter} = bridge_priority forward_delay_time hello_address hello_time listen_time mode path_cost_port1 path_cost_port2 Description The SET SPANTREE command enables you to change the Spanning Tree configuration parameters of the local Bridge Module.
SET SPANTREE BRIDGE_PRIORITY Use the SET SPANTREE BRIDGE_PRIORITY command to change the Spanning Tree priority of the local Bridge Module. Format SET SPANTREE BRIDGE_PRIORITY {variable} Parameters {variable} = 0 - 65535 (default is 128) Example OEBM> set spantree bridge_priority 117 [ENTER] Spanning tree parameter changed Description The SET SPANTREE BRIDGE_PRIORITY command enables you to change the Spanning Tree priority of the local Bridge Module.
SET SPANTREE FORWARD_DELAY_TIME Use the SET SPANTREE FORWARD_DELAY_TIME command to set the amount of time bridges wait in each of the states when moving from Listening to Forwarding mode. This value will take effect for the overall network when this bridge becomes the Root Bridge. Format SET SPANTREE FORWARD_DELAY_TIME {variable} Parameters {variable} = 4 - 30 seconds (default is 15 seconds) See Note for range restrictions.
As a reminder, this parameter at the local Bridge Module has no effect on the operation of the network until the local bridge becomes the Root Bridge. While the local bridge is a non-root bridge, it will function using the Root Bridge's value for this parameter. Note: If you choose to modify the spantree parameter default values for forward_delay_time, hello_time, or listen_time, you must use the following two formulas to calculate new values: 1. 2 * (forward_delay_time - 1.0 seconds) > listen_time 2.
SET SPANTREE HELLO_ADDRESS Use the SET SPANTREE HELLO_ADDRESS command to modify the MAC address which the Bridge Module uses for its spanning tree hello address.
SET SPANTREE HELLO_TIME Use the SET SPANTREE HELLO_TIME command to change how often the local bridge sends out a hello packet when it becomes the Root Bridge. This value will take effect for the overall network when this bridge becomes the Root Bridge. Format SET SPANTREE HELLO_TIME {variable} Parameters {variable} = 1 - 10 (default is 2 seconds) See Note for range restrictions.
2. listen_time > 2 * (hello_time + 1.0 seconds) The following two examples use the formulas with parameter default values to calculate new values. 1. 2 * (15 seconds - 1.0 seconds) = 28 seconds > 20 seconds. Since 28 seconds is greater than the listen_time default value of 20 seconds, this setting is valid. 2. 20 seconds > 2 * (2 seconds + 1.0 second) = 6 seconds Since 20 seconds is greater than 6 seconds, this setting is valid.
SET SPANTREE LISTEN_TIME Use the SET SPANTREE LISTEN_TIME command to specify how long bridges will wait for the Root Bridge to send out a hello packet. This value will take effect for the overall network when this bridge becomes the Root Bridge. Format SET SPANTREE LISTEN_TIME {variable} Parameters {variable} = 6 - 40 (default is 20 seconds) See Note for range restrictions. Example OEBM> set spantree listen_time 7 [ENTER] Spanning tree parameter changed.
Note: If you choose to modify the spantree parameter default values for forward_delay_time, hello_time, or listen_time, you must use the following two formulas to calculate new values: 1. 2 * (forward_delay_time - 1.0 seconds) > listen_time 2. listen_time > 2 * (hello_time + 1.0 seconds) The following two examples use the formulas with parameter default values to calculate new values. 1. 2 * (15 seconds - 1.0 seconds) = 28 seconds > 20 seconds.
SET SPANTREE MODE Use the SET SPANTREE MODE command to en able or disable the Spanning Tree Algorithm and Protocol (STAP). Format SET SPANTREE MODE {setting} Parameters {setting} = disable enable (default) Example OEBM> set spantree mode disable [ENTER] Spanning tree parameter changed Description The SET SPANTREE MODE command allows you to enable or disable the Spanning Tree Algorithm and Protocol (STAP).
SET SPANTREE PATH_COST_PORT1 Use the SET SPANTREE PATH_COST_PORT1 command to change the path cost of port 1 on the local Bridge Module. Format SET SPANTREE PATH_COST_PORT1 {variable} Parameters {variable} = 1 - 65535 (default is 10) Example OEBM> set spantree path_cost_port1 17 [ENTER] Spanning tree parameter changed Description The SET SPANTREE PATH_COST_PORT1 command enables you to change the path cost of port 1 on the local Bridge Module.
SET SPANTREE PATH_COST_PORT2 Use the SET SPANTREE PATH_COST_PORT2 command to change the path cost of port 2 on the local Bridge Module. Format SET SPANTREE PATH_COST_PORT2 {variable} Parameters {variable} = 1 - 65535 (default is 10) Example OEBM> set spantree path_cost_port2 36 [ENTER] Spanning tree parameter changed Description The SET SPANTREE PATH_COST_PORT2 command enables you to change the path cost of port 2 on the local Bridge Module.
SET TERMINAL Use the SET TERMINAL command to change the TERMINAL parameters for the Bridge Module. These configurations enable the Bridge Module to communicate with the terminal to which it is connected. Format SET TERMINAL {parameter} Parameters {parameter} = baud data bits hangup parity prompt stop_bits timeout Description The SET TERMINAL commands enable you to change the terminal configuration for the Bridge Module. The SET TERMINAL command parameters have parameters of their own.
SET TERMINAL BAUD Use the SET TERMINAL BAUD command to establish the appropriate baud rate at which the Bridge Module receives and transmits data to your terminal or modem. Format SET TERMINAL BAUD {baud rate} Parameters {baud rate} = 300, 1200, 2400, 4800, or 9600 (default is 9600) Example This example changes the baud rate to 4800 baud.
2. Issue the SET TERMINAL BAUD command to set the Bridge Module terminal port baud rate to your specifications. Once you set this lower rate, you will lose your connection to the Bridge Module since your terminal is set to a different rate. 3. Remove the terminal connection, change the terminal's baud rate, and reconnect the terminal to the serial port to resume your connection to the Bridge Module.
SET TERMINAL DATA_BITS Use the SET TERMINAL DATA_BITS command to set the number of data bits used by your terminal. Format SET TERMINAL DATA_BITS {data bits} Parameters {data bits} = 7 8 (default) Example This example changes the data bits to 7. OEBM> set terminal data_bits 7 [ENTER] Terminal parameter changed Description The SET TERMINAL DATA_BITS command enables you to set the number of data bits used by your terminal.
SET TERMINAL HANGUP Use the SET TERMINAL HANGUP command to configure how a modem connection is terminated when the LOGOUT command is entered during a modem session. Format SET TERMINAL HANGUP {setting} Parameters {setting} = disable (default) enable Example OEBM> set terminal hangup enable [ENTER] Terminal parameter change Description The SET TERMINAL HANGUP command enables you to configure how a modem connection is terminated when the LOGOUT command is entered during a modem session.
SET TERMINAL PARITY Use the SET TERMINAL PARITY command to set the parity to match the parity setting used by your terminal. Format SET TERMINAL PARITY {parity} Parameters {parity} = even none (default) odd Example This example changes the terminal parity to even. OEBM> set terminal parity even [ENTER] Terminal parameter changed Description The SET TERMINAL PARITY command enables you to set the parity to match the parity setting used by your terminal.
SET TERMINAL PROMPT Use the SET TERMINAL PROMPT command to customize the management prompt that displays on your terminal when connected to a local Bridge Module. Format SET TERMINAL PROMPT {prompt} Parameters {prompt} = terminal prompt up to 15 characters Example This example changes the terminal prompt to OEBM3>.
SET TERMINAL STOP_BITS Use the SET TERMINAL STOP_BITS command to establish the number of stop bits between characters when communicating between your terminal and the Bridge Module. Format SET TERMINAL STOP_BITS {stop bits} Parameters {stop bits} = 1 2 (default) Example This example changes the Bridge Module stop bits parameter to 1.
SET TERMINAL TIMEOUT Use the SET TERMINAL TIMEOUT command to set the amount of time that your terminal may be unattended before being logged off from the Bridge Module. Format SET TERMINAL TIMEOUT {minutes} Parameters {minutes} = minutes from 1 - 30 0 (zero - for no timeout) Example This example changes the Bridge Module timeout parameter to 3 minutes.
If TIMEOUT has been set for a remote Bridge Module and the time expires, you will be logged out of the remote bridge and returned to the local bridge connection.
SHOW Use the SHOW command to list the current bridge attributes. The SHOW command requires a parameter to display bridge attributes. Format SHOW {parameter} Parameters {parameter} = alert bridge community counter device filter last_error spantree terminal Description The SHOW command displays the current configuration settings for the Bridge Module. The commands to set these configurations are described in the SET command section.
SHOW ALERT Use the SHOW ALERT command to display alert configuration settings. Format SHOW ALERT Parameters none Example OEBM> show alert Alert AUTHENTICATION Alert CHANGE Alert HELLO [ENTER> set to ENABLE set to ENABLE set to ENABLE Description The SHOW ALERT command displays current alert configuration settings. These settings are described in the SET ALERT commands section.
SHOW BRIDGE Use the SHOW BRIDGE command to display bridge parameters and their current values. Format SHOW BRIDGE Parameters none Example OEBM> show bridge [ENTER] Bridge Parameters: Ageing Time: Dip Configuration: Current Status: Protocols Supported: 5 ENABLED Normal Console Terminal Chipcom Remote Console SNMP Per Port Information: Port 1 Channel: Port 2 Channel: Current 1 2 Memory 1 2 Dip 1 2 Description The SHOW BRIDGE command displays bridge parameters and their current values.
Table 4-2 describes the SHOW BRIDGE parameters. Table 4-2. SHOW BRIDGE Command Attributes Attribute Description Ageing Time The rate at which addresses are aged out of the dynamic filtering table. Dip Configuration Determines whether the channel configuration is read from the dip switch settings or memory upon bridge reset. Current Status The current state of the Bridge Module. Protocols Supported The protocols that the Bridge Module supports.
SHOW COMMUNITY Use the SHOW COMMUNITY command to list the current community table for the Bridge Module. Format SHOW COMMUNITY Parameters none Example OEBM> show community Index ————— 1 2 3 4 5 6 7 8 9 10 [ENTER] Community Name —————————————— IP Address —————————— Access ————————— user1 ncs super admin [empty] [empty] [empty] [empty] [empty] [empty] 13.24.38.54 13.24.35.41 13.24.43.83 13.24.56.
SHOW COUNTER Use the SHOW COUNTER command to display the statistical counters for the bridge, ports, protocols, and spanning tree. Format SHOW COUNTER {parameter} Parameters {parameter} = bridge ports protocols spantree Description The SHOW COUNTER command displays the statistical counters for the bridge, ports, protocols, and spanning tree. Since the description for each SHOW COUNTER parameter includes sample output and a table, each parameter is described in the following pages for greater clarity.
SHOW COUNTER BRIDGE Use the SHOW COUNTER BRIDGE command to display the statistical counters for the bridged packets. Format SHOW COUNTER BRIDGE Parameters none Example OEBM> show counter bridge [ENTER] 3658 Seconds Since Clear Spanning Tree State Frames Received for Bridging Frames Transmitted by Bridging Frames Discarded by Filtering Port 1 FORWARDING 10032 9727 1108 Port 2 FORWARDING 9736 10027 0 Description The SHOW COUNTER BRIDGE command displays the statistical counters for the bridged packets.
Table 4-3 describes the SHOW COUNTER BRIDGE attributes. Table 4-3. SHOW COUNTER BRIDGE Command Attributes Attribute Description Seconds Since Clear The time since the Bridge Module was either reset or the CLEAR command was issued for this group of statistics. Spanning Tree State Current Spanning Tree state of this Bridge Module port: Forwarding, Learning, Listening, Blocking, or Disabled. Frames Received for Bridging Number of frames received from the network by this Bridge Module port.
SHOW COUNTER PORTS Use the SHOW COUNTER PORTS command to display the statistical counters for the Bridge Module ports.
Table 4-4 describes the SHOW COUNTER PORTS attributes. Table 4-4. SHOW COUNTER PORTS Command Attributes Attribute Description Seconds Since Clear The time since the local bridge was either reset or the CLEAR command was issued for this group of statistics. Frames Received Number of frames received from the network by this Bridge Module port. Bytes Received Number of bytes received from the network by this Bridge Module port.
Table 4-4. SHOW COUNTER PORTS Command Attributes Attribute Description Excessive Collisions Number of packets the bridge discarded because it could not transmit onto the Ethernet without seeing a collision 16 times in a row. Received Framing Error Number of Ethernet packets received without proper framing. Received Frame Check (FCS) Error Number of Ethernet packets received with bad FCS (Frame Check Sequence) — usually these and framing errors are seen together.
Table 4-4. SHOW COUNTER PORTS Command Attributes Attribute Description SQE (Heartbeat) Failures (You can disable this attribute using the SET DEVICE SQE_MODE command) Number of times the frame was transmitted without successful SQE (heartbeat). This is not a fatal error. It may occur when SQE is turned off at the transceiver. Transmitter Underflowed Number of times a frame transmit aborted because the Ethernet Controller could not access memory.
SHOW COUNTER PROTOCOLS Use the SHOW COUNTER PROTOCOL command to display the statistical counters for the Bridge Module protocols. These counters reflect the amount of traffic on the network.
Table 4-5 describes the SHOW COUNTER PROTOCOLS attributes. Table 4-5. SHOW COUNTER PROTOCOLS Command Attributes Attribute Description Seconds Since Clear The time since the Bridge Module was either reset or the CLEAR command was issued for this group of statistics. Unicast Packets Received Number of packets received for which this bridge is an end station on the attached networks. Non-Unicast Packets Received Number of packets received for which this bridge is an end station on the attached networks.
SHOW COUNTER SPANTREE Use the SHOW COUNTER SPANTREE command to display the statistical counters for the Bridge Module spantree parameters.
Table 4-6 describes the SHOW COUNTER SPANTREE attributes. Table 4-6. SHOW COUNTER SPANTREE Command Attributes Attribute Description Seconds Since Clear The time since the Bridge Module was either reset or the CLEAR command was issued for this group of statistics. Spanning Tree State Current spantree state of the Bridge Module port: Forwarding, Learning, Listening, Blocking, or Disabled. Spanning Tree Frames Received Number of Spanning Tree frames received from the network by this Bridge Module port.
SHOW DEVICE Use the SHOW DEVICE command to display device-related information. Format SHOW DEVICE Parameters none Example OEBM> show device [ENTER] ONline Ethernet Bridge Module (Bridge Module); SNMP Management Name: Bridge3 Boot EPROM Version:v1.3 Flash EPROM Version: v2.00 Serial#:3658 Restarts:9 Service Date: / / Location: Third Floor Engineering MAC Address: IP Address: Subnet Mask Default Gateway Port 1 08-00-8F-10-13-48 127.1.2.3 FF.FF.FF.00 0.0.0.
Table 4-7 describes the command attributes. Table 4-7. SHOW DEVICE Command Attributes Attribute Description MAC Address Unique 48-bit address assigned to this interface. IP Address IP address currently assigned to the Bridge ports. Subnet Mask Subnetwork mask specified for the network Internet class. Default Gateway IP address of the default gateway for packets with an unknown destination IP address.
SHOW FILTER Use the SHOW FILTER command parameters to display the entries in the dynamic address filter table, the contents or mode of the protocol ID table, and the contents of the static address table. Format SHOW FILTER {parameter} Parameters {parameter} = dynamic_address_table mode protocol id_table static_address_table Description The SHOW FILTER command displays the entries in the dynamic address filter table, the contents or mode of the protocol ID table, and the contents of the static address table.
SHOW FILTER DYNAMIC_ADDRESS_TABLE Use the SHOW FILTER DYNAMIC_ADDRESS_TABLE command to display active entries in the dynamic address filter table at each of the bridge ports. Format SHOW FILTER DYNAMIC_ADDRESS_TABLE {port} Parameters {port} = port1 port2 Example The following example displays the active entries in the dynamic filter table for port 1.
SHOW FILTER MODE Use the SHOW FILTER MODE command to display the current protocol id table filtering mode. Format SHOW FILTER MODE Parameters none Example OEBM> show filter mode [ENTER] Filtering Mode: Protocol ID table mode is FILTER Description The SHOW FILTER MODE command displays the current protocol id table filtering mode. Filtering modes are either disabled, filter, or forward.
SHOW FILTER PROTOCOL_ID_TABLE Use the SHOW FILTER PROTOCOL_ID_TABLE command to display the contents of the protocol id table. Format SHOW FILTER PROTOCOL_ID_TABLE Parameters none Example OEBM> show filter protocol_id_table [ENTER] Filtering Mode: Protocol ID table mode is FILTER 08-06 08-05 Description The SHOW FILTER PROTOCOL_ID_TABLE command displays the contents of the protocol id table.
SHOW FILTER STATIC_ADDRESS_TABLE Use the SHOW FILTER STATIC_ADDRESS_TABLE command to display the the MAC addresses in the static address table configured with the filter type you specify. Format SHOW FILTER STATIC_ADDRESS_TABLE {variable} Parameters {variable} = always_forward never_forward_to_port1 never_forward_to_port2 Example This example shows the command used with the always_forward parameter. OEBM> show filter static_address_table always_forward [ENTER] No entries of this address filter type found.
SHOW LAST_ERROR Use the SHOW LAST_ERROR command to display information on the last fatal error that occurred at the local bridge. Format SHOW LAST_ERROR Parameters none Example OEBM> show last_error [ENTER] Display of Last Error - Flash Version: v2.
SHOW SPANTREE Use the SHOW SPANTREE command to display the current Spanning Tree information for the local bridge. Note that the values listed for forward_delay_time, hello_time, and listen_time are active and in effect ONLY when the local bridge is the root of the Spanning Tree.
These values (the ones imposed by the current Root Bridge) are displayed with the MONITOR SPANTREE command as the active HELLO_TIME, active FORWARD_DELAY_TIME, and active LISTEN_TIME. Table 4-8 describes the SHOW SPANTREE command attributes. Table 4-8. SHOW SPANTREE Command Attributes Attribute Description Bridge Priority The priority of this bridge. The bridge priority is used with the bridge Ethernet address to determine which bridge becomes the Root Bridge in the network.
Table 4-8. SHOW SPANTREE Command Attributes (Continued) Attribute Description Listen Time (sec) The amount of time (in seconds) that bridges will wait for the Root Bridge to send out its Multicast address packet (hello packet) when this bridge is root. Spantree Hello Address This is the destination address of the Root Bridge's Muticast address packet (hello packet). This packet is sent to all other bridges to let them know the root is still active.
SHOW TERMINAL Use the SHOW TERMINAL command to display the terminal configuration. Format SHOW TERMINAL Parameters none Example OEBM> show terminal [ENTER] Terminal Parameters: Baud Data bits Parity Stop bits Timeout time Hangup Type 9600 8 NONE 2 0 DISABLE DUMB Description The SHOW TERMINAL command displays the current terminal parameters.
5 Troubleshooting This chapter provides useful information for diagnosing unexpected results when using the Bridge Module. It is divided into the following sections: ❑ Applying Power ❑ Power-Up Self-Test ❑ Management Interface ❑ Bridge Operation ❑ Technical Assistance Applying Power Under normal conditions, when you install the Bridge Module, the TEST LED lights and the TX and RX LEDs illuminate different patterns.
. Table 5-1. Applying Power Suggestions Problem Troubleshooting Suggestions All indicators are off. Check that the concentrator is receiving power. Press the LED check button on the Controller Module to verify that the LED is not burned out. All the LEDs should light. Verify that the Bridge Module is installed correctly by following the installation instructions in Chapter 2. Pull the Bridge Module out and then slide it back in, or install the module in another pair of concentrator slots.
. Table 5-2. Power-Up Self-Test Suggestions Problem The test indicator continues blinking. Troubleshooting Suggestions Press the RESET button on the front panel to restart the power-up sequence. If the result is the same, try the next step. Make sure the AUI loopback connector or transceiver cable is securely attached to the AUI port. If transceiver cable is attached to the AUI port, check the following: ❑ Make sure the transceiver and transceiver cable are compatible (see Appendix C).
Management Interface Follow the directions in Chapter 2 for attaching your terminal to the Bridge Management Interface. Under normal conditions, the prompt, “OEBM>” appears on the screen once you press [ENTER]. Table 5-3 lists some common Management Interface problems that may occur when the Bridge Module is first set up to communicate with the terminal. Table 5-3. Management Interface Suggestions Problem Troubleshooting Suggestions Nothing appears on the screen.
Table 5-3. Management Interface Suggestions (Continued) Problem Troubleshooting Suggestions The management prompt on the screen is not as you set it. The Bridge Module is connected to a remote device or you did not save the new prompt. Refer to the REMOTE_LOGIN and LOGOUT commands in Chapter 4. The prompt >> appears on the screen. The bridge is operating out of the Boot PROM code for the Bridge Module. The Boot PROM code contains a subset of the operating code that is contained on the Flash EPROM.
Technical Assistance You can receive assistance for installing and troubleshooting the Bridge Module by calling either your 3Com reseller or 3Com Technical Support.
6 Firmware Download Instructions This chapter explains how to download new software to the Flash EPROM in your ONline Ethernet Bridge Module. New software is provided to registered owners by 3Com Corporation when new features or enhancements are available for the module. Contact your 3Com representative for information and pricing on upgrades.
❑ You must have the ONline Ethernet Bridge Module Update Distribution Kit from 3Com (Part Number 5102B-UDK-x.x). The Update Kit has two versions - limited and unlimited. The limited version (5102B-UDKL-x.x) allows you to update one Bridge Module per site and includes: – One set of 3Com diskettes (includes a 5 1/4" diskette and a 3 1/2" diskette) – 3Com software license – Installation instructions and a new user manual – Release Notes The unlimited version (5102B-UDKU-x.
EPROMs. The first time you update the firmware requires that you purchase both an FDK and a UDK. All updates after that time require that you have the new version of the UDK (and the original FDK). When 3Com issues a software upgrade, the upgrade is sent on diskette (UDK) to all registered users. The upgrade takes only ten or fifteen minutes, after which time the Bridge Module will be up and running the new version of software.
******************************************************************* 3Com CORPORATION Firmware Distribution Kit Copyright 199X 3Com Corporation This Firmware Distribution Kit will install and configure ProComm, a terminal emulation program, on you computer’s hard disk or on a second floppy drive. The program will reside in the directory called PROCOMM. Make sure you have the PROCOMM Distribution Diskette and the 3Com Firmware Distribution Diskette ready at all times during the installation.
7. Enter the number of the communications port (COM1, COM2, etc.) to which you will be connecting the RS-232 cable on the PC to perform the software download following the “Enter the COM Port (1-4):” prompt. Then press the Down Arrow key (↓) or [TAB] to move to the next field. Note: If you are performing a two-floppy installation, follow Step 8. If you are performing a floppy-to-hard drive installation, follow Steps 9 and 10. 8.
****************** ****************** ******************************************************************* 3Com CORPORATION Firmware Distribution Kit Copyright 199X 3Com Corporation This Firmware Distribution Kit will install and configure ProComm, a terminal emulation program, on you computer’s hard disk or on a second floppy drive. The program will reside in the directory called PROCOMM.
This Firmware Distribution Kit will install and configure ProComm, a terminal emulation program, on you computer’s hard disk or on a second floppy drive. The program will reside in the directory called PROCOMM. Make sure you have the PROCOMM Distribution Diskette and the 3Com Firmware Distribution Diskette ready at all times during the installation.
2. Connect the other end of the cable to the serial port on your PC (using the provided 9- to 25-pin adapter if necessary). Make sure you connect the cable to the communications port you specified in the ProComm install instructions. Download the New Bridge Module Software This step copies the new Bridge Module software (UDK) to the Flash EPROM on the Bridge Module. Note that this procedure creates a file called profile.cmd in the PROCOMM directory.
Update Distribution Kit 3Com CORPORATION Copyright 199X 3Com Corporation This Update Distribution Kit will start ProCommso you can download new software to your 3Com device. Make sure you follow the instructions carefully to avoid downloading the wrong file to your device. Downloading the wrong file may damage the device.
(R) Version 2.4.3 Copyright (C) 1985-1988 DATASTORM TECHNOLOGIES,INC. All Rights Reserved ProComm is user supported software. It is not free, and it is not in the public domain. You are granted a limited license to use ProComm for a trial period. If you decide to continue using ProComm, you must register by sending $50 for registration, disk and manual to the address below. (Missouri residents please add 6.475% sales tax.) DATASTORM also publises PROCOMM PLUS.
ALT-F10 VT-100 FDX 9600 N81 LOG CLOSED PRT OFF CR CR Figure 6-6. ProComm Status Line Screen 8. Press [ENTER] to display the Password: prompt, and then log in to the system with the administrator password. (Note that the MGMT LED on the faceplate of the unit will light up.) Note: Before you start the download procedure it is important to note that the system will prompt you twice for the Download command.
9. Type the following DOWNLOAD command and press [ENTER]. OEBM> maintain download out_of_band [ENTER] Warning: Download will erase your current operational code. You will need the following to replace the software: 1. PC running Procomm communications software 2. 3Com ONline Bridge Module software media If you are sure to want to do a download, enter the Download command again within 10 seconds. Otherwise, this sequence will be aborted. OEBM> 10.
Command FIles OEBMV212.CMD Command file: Password: OEBM> maintain download out_of_band Please enter your password to begin the download process Password: Please enter your password again Password: Preparing the brindge for download... Please enter the download sequence: ALT-F10 VT-100 FDX 9600 N81 LOG CLOSED PRT OFF CR CR Figure 6-7. ProComm Pop-Up Menu Screen 13. Press [ENTER] to download the OEBx_xx.CMD file to the Flash EPROM (where x_xx is the software version).
PROTOCOL: FILE NAME: FILE SIZE: BLOCK CHECK: TRANSFER TIME: BYTES TRANSFERRED: BLOCKS TRANSFERRED BLOCKS IN FILE: ERROR COUNT: LAST MESSAGE: NONE XMODEM oebmv212.bin xxxxx CRC xx:xx xxxx xxxx xxxx 0 OEBM> Maintain download out_of_band Please enter your passworkd to begin the download process Password: Please enter your password again Password: Preparing the brindge for download... Figure 6-8.
EXIT TO DOS? (Y/N) Figure 6-9. Exit ProComm Screen 15. Enter Y to exit from ProComm. 16. Disconnect the cable from the PC and the Bridge Module. The module is now updated with the new software. Troubleshooting This section discusses possible problems you may encounter during the download process. The problems are divided into ProComm Problems and Bridge Module Problems.
Commonly Asked Questions, Appendix G, and Chapter 7. Refer also to Table 6-1 which lists common UDK error messages. Table 6-1. UDK Error Messages Message Troubleshooting Suggestion Invalid Source or ProComm Drive Specifications The drive letter entered where the UDK program may find the 3Com distribution diskette, or ProComm is invalid. The drive letter entered for the 3Com distribution diskette must be 'A' or 'B'.
Table 6-1. UDK Error Messages (Continued) Message Troubleshooting Suggestion Fatal Error: Insufficient Available Memory to run ProComm A minimum of 200k bytes of free memory is necessary to successfully run ProComm and to do the download. Decreasing the number of Terminate and Stay Resident Programs present while running the UDK program will free memory.
Table 6-2. Bridge Module Download Error Messages (Continued) Problem Troubleshooting Suggestion Packet out of sequence Try again. If the problem persists, call 3Com Support. Incorrect code version Try again. If the problem persists, call 3Com Support. Flash EPROM overflow Try again. If the problem persists, call 3Com Support. Flash EPROM program error Try again. If the problem persists, call 3Com Support. Flash EPROM erase error Try again. If the problem persists, call 3Com Support.
A Specifications This appendix lists specifications for the ONline Ethernet Bridge Module. There are five subsections: ❑ General Specifications ❑ Electrical Specifications ❑ Environmental Specifications ❑ Mechanical Specifications ❑ Hardware Specifications General Specifications Baseband Connection: Ethernet or IEEE 802.
Cable Interface: One 15-pin D-subminiature, female Ethernet V2.0 or IEEE 802.3 AUI One male 25-pin D-subminiature, RS-232-C, DTE Interconnect Characteristics Supports IEEE 802.1(d) Spanning Tree Protocol Filter Rate: 20,000 packets per second Forward Rate: 10,000 packets per second Data Rate (maximum throughput): 9.7 Mbps Filtering Table: Maximum of 8,000 entries Packet Format: Any valid IEEE 802.3 or Ethernet frame from minimum of 64 octets to maximum of 1518 octets.
Environmental Specifications Operating Temperature: 0° to 50° C (32° to 122° F) Storage Temperature: -30° to 65° C (-22° to 149° F) Humidity: less than 95%, non-condensing BTU/hour: 51.2 Mechanical Specifications Dimensions: 2.0" W x 10.25" L x 8.5" H (5.08 cm x 26.04 cm x 21.6 cm) Weight: 2.0 lbs (0.91 kg.
B Spanning Tree Discussion This appendix briefly discusses the Spanning Tree Algorithm and Protocol (STAP) and how it is used with the Bridge Module. For greater detail about the internal workings of STAP, consult source books designed for this type of information, such as the IEEE Draft Standard 802.1(d).
Root Port - The port on the bridge with the lowest “root path cost”; the port closest to the root bridge. Bridge Operating States: Forwarding - Active state where the bridge is forwarding packets and an active member of the network as a designated bridge. Learning - Intermediate state before “forwarding” where the bridge is learning the Address Filtering information. Listening - Intermediate state between “blocking” and “learning” where the bridge is just monitoring the network.
Figure B-1. Spanning Tree Network Architecture When a bridge is installed into a network, it assumes that it is the root of the network until it is told otherwise. We will call this bridge BRIDGE_3. Thinking it is root, BRIDGE_3 transmits packets onto all the networks to which it is connected, letting adjacent bridges know that it believes it is root. If an adjacent bridge sees that there is a bridge more deserving of the title root bridge of the Spanning Tree (i.e.
designated bridge for the sample shown in Figure B-1 as it forwards information from LAN 1 and LAN 2 to the Root Bridge (BRIDGE_4). If BRIDGE_3 is told that it is not the designated bridge, it will go into blocking state. In blocking state the bridge monitors the network but is not involved in forwarding packets.
Figure B-2. Configuration With Multiple Bridge Modules The Midnight Bridge called Bridge A is determined to be the Root Bridge in this configuration. Bridge B and Bridge E are in blocking state as they were determined to be redundant in this network.
C Cable Pinouts This appendix describes the cable pinouts for both transceiver cables and RS-232 cables. Also described in this appendix are some common problems you may encounter with your transceiver cables and some suggested solutions.
Figure C-1. Bridge Module Female AUI Connector Table C-1. AUI Cable Pin Chart Pin IEEE 802.3 V2.0, V1.
Table C-1. AUI Cable Pin Chart (Continued) 12 DI-B Receive - 13 VP Power + 14 VS Reserved 15 C0-B Reserved Shell Protective ground Shield terminated to connector shell Transceiver Cable Differences Because AUI Transceiver cables may be built to any of three Ethernet standards (V1.0, V2.0, and IEEE 802.3), signal differences may occur between different types of transceiver cables.
V2.0 All shields are connected to pin 1 and the AUI connector shell. Pin 4 is not used. Most Ethernet cables are built this way. V1.0 Shielding of individual signal or power pairs is not required, since most V1.0 con-trollers and transceivers are DC-coupled. The overall AUI cable shield provides for shielding and grounding and is connected to pin 1 and the AUI connector shell. In practice, most Ethernet V1.0 equipment uses version 2.
Also, since 802.3 AUI cables provide a ground shield isolated from the signal and power pair's shields, these cables provide additional noise immunity in noisy operating environments. Cable Configuration Rules Refer to the following configuration rules when configuring your network. 1. If the Bridge Module is to be connected to an IEEE 802.3 transceiver, such as DEC's DESTA™, the transceiver cable must be IEEE 802.3 compliant. 2. If the Bridge Module is to be connected to a non-IEEE 802.
Cable Configuration Make sure the transceiver cable does not exceed the maximum lengths described in Table C-3. Also, follow the configuration rules listed below. Table C-3. Maximum Cable Lengths Cable Type Maximum Cable Length From To Baseband Transceiver Bridge Module Ethernet V2.0 or IEEE 802.3 38 m (125 ft) Baseband Transceiver Bridge Module Office Transceiver Cable (High Attenuation) 12 m (39.
– Shell connector not crimped onto AUI cable braid. – Ribbon cables in computers not shielded or improperly mounted. ❑ Broken pair wires or unseated AUI connector pin. ❑ Improper pairing: – ❑ Verify that signal and power wires are paired, that is, Transmit + paired with Transmit -, etc. Individual pairs not individually shielded (Ethernet V1.0 type cable). Recommendations ❑ The Bridge Module is fully compatible with IEEE 802.3 and Ethernet V2.0. The use of Ethernet V1.
Figure C-2. Management Interface RS-232 Connector and Cable Pinouts Table C-4. RS-232 Cable Pin Chart Pin 1 DTE Chassis Ground ← 2 Transmitted Data ← 3 Received Data → 4 Request To Send (Active Low +12.0V) ← 5 Clear To Send 7 Signal Ground → 20 Data Terminal Ready (Active High +12.
D Power-Up Self-Test This appendix describes the diagnostic tests run by the Bridge Module upon power up. This section also explains how to start the Bridge Module self-test and how to interpret LED and screen displays that result from the various tests. The last section explains what to do if an error does occur.
self-test routine results in an error condition, the TEST indicator blinks and the remaining LEDs display a code indicating which specific test was running when the error occurred. The LED error display uses the top six LEDs on the front panel to create the Diagnostic Code. These codes are binary representations, where ON is a 1 and OFF is a 0. All of the codes and a brief description are listed in Table D-1.
Table 4-1.
followed by a left parentheses. These messages start about halfway through the self-test after preliminary functionality is verified. For example, when the LANCE 802.3 port test starts, the following appears on the screen: lance_1( When the routine is completed successfully, a right parentheses appears, followed by the next routine.
If you are unable to correct the condition based on the information in Chapter 5, contact 3Com Customer Support as explained in the Technical Assistance section in Appendix E. Please have the recorded information available when you call.
E Technical Support 3Com provides easy access to technical support information through a variety of services.
Email Technical Support You can contact the Integrated Systems Division (formerly Chipcom) on the Internet for technical support using the e-mail address techsupp@chipcom.com. World Wide Web Site You can access the latest networking information on the 3Com World Wide Web site by entering our URL into your Internet browser: http://www.3Com.
When you contact your network supplier for assistance, have the following information ready: ❑ Diagnostic error messages ❑ A list of system hardware and software, including revision levels ❑ Details about recent configuration changes, if applicable If you are unable to contact your network supplier, see the following section on how to contact 3Com. Support from 3Com If you are unable to receive support from your network supplier, technical support contracts are available from 3Com.
For access to customer service for all 3Com products, call (800) 876-3266. You can also contact the Integrated Systems Division (ISD) on the Internet by using the e-mail address techsupp@chipcom.com. Returning Products for Repair A product sent directly to 3Com for repair must first be assigned a Return Materials Authorization (RMA) number. A product sent to 3Com without an RMA number will be returned to the sender unopened, at the sender’s expense.
3. Enter your full Internet e-mail address as the password (for example, jdoe@company.com). 4. Change to the mib or schema directory using the cd /pub/mibs or cd /pub/mibs/schemas command. 5. To view the 3Com MIB, OID, or schema entries, enter the dir command. ❑ To pause the display, press [CTRL-S]. ❑ To continue the display, press [CTRL-Q]. 6. Copy the MIB, OID, or schema files to your current directory using the appropriate command (for example, get chipcom.mib). 7.
Index Symbols ? Command, 4-9 Numerics 3Com Bulletin Board Service (3ComBBS), E-3 A Accessing Bridge Management, 3-2 Ageing_Time Parameter, 3-20 Dynamic Filtering Table, 3-20 Audience of Manual, xv Automatic Modem Hangup, 3-12 B Backplace Connections, 1-11 Baud Rate, 3-10 Bridge and Channel Parameters Setting, 2-15 Bridge Management Accessing, 3-2 Commands, 3-2 Password Protection, 3-12 Remote Management, 3-19 Bridge Management Commands Editing, 3-2 Entering, 3-2 Bridge Management Interface, 3-9 Bridge Mo
C Channel Check Codes, 2-8 Channel-Select Switch Settings, 2-7 Clear Command, 3-23, 4-11 Activating, 3-23 Clear Counter Command, 4-12 Clear Filter Command, 4-13 Clear Last_Error Command, 4-14 Command Completion, 3-3, 4-19 Completion List, 4-20 Command Line Key Functions, 3-3 Commands ?, 3-4 Clear Community, 4-11 Clear Counter, 4-12 Clear Filter, 4-13 Clear Last_Error, 4-14 Conventions, 4-1 Force, 4-15 Help, 3-4, 4-18 Logout, 3-19, 4-21 Maintain, 4-22 Monitor, 3-22, 4-24 Ping, 4-26 Reference Chart, 4-1 Remot
Show Show Show Show Show Counter Ports, 4-93 Counter Protocols, 4-97 Counter Spantree, 4-99 Filter, 4-103, 4-104, 4-106, 4-107 Filter Dynamic_Address_Table, 4-104 Show Filter Mode, 4-105 Show Filter Protocol_ID_Table, 4-106 Show Filter Static_Address_Table, 4-107 Show Last_Error, 4-108 Show Spantree, 4-109 Show Terminal, 4-112 Summary, 4-3 Configuring Parameters Bridge Module Name, 3-15 Concentrator Reboot Values, 3-16 Contact Name, 3-16 Location, 3-16 Management Prompt, 3-15 Terminal Timeout, 3-16 Config
G MS-DOS Networking Software, 2-18 General Specifications, A-1 N H Hardware Specifications, A-3 Help Command, 3-4, 4-18 Network Management Capabilities, 1-9 Network Management Capabilities, 1-8 network supplier support, E-2 I O Installation Precautionary Procedures, 2-1 Installation Procedure, 2-9 Pre-Installation Test, 2-10 Summarized, 2-3 Installing ProComm Software, 6-3 Instructions Downloading Firmware, 6-3 Interconnect Characteristics, A-2 ONline Controller Module LED/Channel Check Button, 2-8
Ping Command, 4-2, 4-26 Power-Up Self-Test, 5-2 Troubleshooting, 5-2 Precautionary Procedures Electrostatic Discharge, 2-1 ProComm Diskettes, 6-1 Reference Manual, 6-1 Software License, 6-1 ProComm Software Installing, 6-3 Screen Display, D-3 Set Bridge Ageing_Time Command, 4-38 Set Bridge Channel Command, 4-39 Set Bridge Command, 4-37 Set Bridge Dip_Configuration Command, 4-40 Set Bridge Side_Switch Command, 4-41 Set Command, 3-9, 4-34, 4-35 Set Community Command, 4-42 Set Device Command, 4-44 Set Device
Set Terminal Data_Bits Command, 4-78 Set Terminal Hangup Command, 4-79 Set Terminal Parity Command, 4-80 Set Terminal Prompt Command, 4-81 Set Terminal Stop_Bits Command, 4-82 Set Terminal Timeout Command, 4-83 Setting SNMP Values Alert Settings, 3-18 Community Table, 3-17 Default Gateway, 3-18 IP address, 3-17 Subnet Mask, 3-18 Show Alert Command, 4-86 Show Bridge Command, 4-87 Show Command, 4-85 Show Community Command, 4-89 Show Counter Bridge Command , 4-91 Show Counter Command, 4-90 Show Counter Ports C
