CheetahSwitch Workgroup-4508 Management Guide
Management Guide CheetaSwitch Workgroup-4508 Intelligent Gigabit Ethernet Switch with 8 1000BASE-SX (SC) Ports
Copyright © 2000 by Accton Technology Corporation. All rights reserved. No part of this document may be copied or reproduced in any form or by any means without the prior written consent of Accton Technology Corporation. Accton makes no warranties with respect to this documentation and disclaims any implied warranties of merchantability, quality, or fitness for any particular purpose. The information in this document is subject to change without notice.
Contents Chapter 1: Managing the Switch Configuration Options Making Connections for System Configuration Onsite Connection Modem Connection Telnet Connection In-Band Network Connection Chapter 2: Using the System Configuration Program Main Menu System Information Menu Displaying System Information Displaying Version Information Management Setup Menu Changing the Network Configuration IP Configuration IP Connectivity Test (Ping) Access Host Configuration HTTP Configuration Configuring the Serial Port Assig
Configuring Traffic Classes Port Priority Configuration 802.1p Port Traffic Class Information Configuring Virtual LANs 802.1Q VLAN Base Information 802.1Q VLAN Current Table Information 802.1Q VLAN Static Table Configuration 802.
Priority Port Priority Configuration Port Traffic Class Information Configuring VLANs VLAN Basic Information VLAN Current Table VLAN Static List VLAN Static Table VLAN Static Membership by Port VLAN Port Configuration IGMP Multicast Filtering Configuring IGMP IP Multicast Registration Table Port Menus Port Information Port Configuration Port Mirroring Configuration Port Statistics Etherlike Statistics RMON Statistics Broadcast Storm Control Chapter 4: Advanced Topics Spanning Tree Algorithm Virtual LANs As
iv
Chapter 1: Managing the Switch Configuration Options The CheetahSwitch Workgroup-4508 provides a menu-driven system configuration program that can be accessed through a direct console connection or modem connection to the serial port on the switch’s rear panel (out-of-band), or by a Telnet connection over the network (in-band). The switch also includes an embedded HTTP Web agent. This Web agent can be accessed using a standard Web browser from any computer attached to the network.
CheetahSwitch Workgroup-4508 Making Connections for System Configuration The switch includes a menu-driven configuration program. The ASCII interface to this program can be accessed by making a direct connection to the serial port on the rear panel, or by a Telnet connection to the switch over the network.
Management Guide Telnet Connection Prior to accessing the switch via an in-band Telnet connection, you must first configure it with a valid IP address, subnet mask, and default gateway using an out-of-band connection or BOOTP protocol. After configuring the switch’s IP parameters, you can access the on-board configuration program from anywhere within the attached network. Note: Up to four Telnet sessions are supported.
CheetahSwitch Workgroup-4508 1-4
Chapter 2: Using the System Configuration Program Once a direct connection to the serial port or a Telnet connection is established, the login screen for the on-board configuration program appears as shown below.
CheetahSwitch Workgroup-4508 Main Menu With the system configuration program you can define system parameters, manage the switch and all its ports, or monitor network conditions. The figure below of the Main Menu and the following table briefly describe the selections available from this program. Note: Options for the currently selected item are displayed in the highlighted area at the bottom of the interface screen. CheetahSwitch Workgroup - 4508 Main Menu System Information Menu...
Management Guide Parameter Port Information Description Displays operational status, including link state, flow control method, speed and duplex mode. Spanning Tree Configuration Enables Spanning Tree Algorithm; also sets parameters for hello time, maximum message age, switch priority, and forward delay; as well as port priority, path cost and Fast STA mode. Spanning Tree Information Displays full listing of parameters for the Spanning Tree Algorithm.
CheetahSwitch Workgroup-4508 System Information Menu Use the System Information Menu to display a basic description of the switch, including contact information, and hardware/firmware versions. CheetahSwitch Workgroup - 4508 System Information Menu System Information ... Switch Information ... Use or arrow keys to move. to select.
Management Guide Displaying Version Information Use the Switch Information screen to display hardware/firmware version numbers, as well as the power status. CheetahSwitch Workgroup - 4508 Switch Information Hardware Version POST ROM Version Firmware Version Serial Number Port Number Internal Power Status Redundant Power Status : : : : : : : V1.0 V01.00.00 V01.00.01 8 Use or arrow keys to move. to select.
CheetahSwitch Workgroup-4508 CheetahSwitch Workgroup - 4508 Management Setup Network Configuration ... Serial Port Configuration ... SNMP Configuration ... Console Login Configuration ... TFTP Download ... Use or arrow keys to move. to select. Changing the Network Configuration Use the Network Configuration menu to set the bootup option, configure the switch's Internet Protocol (IP) parameters, enable the on-board Web agent, or enable Telnet access.
Management Guide IP Configuration Use the IP Configuration screen to set the bootup option, or configure the switch's IP parameters. The screen shown below is described in the following table. CheetahSwitch Workgroup - 4508 Network Configuration: IP Configuration Interface Type IP Address Subnet Mask Gateway IP IP State : : : : : Ethernet 10.1.113.29 255.255.0.0 10.1.0.254 USER-CONFIG Use or arrow keys to move. other keys to make changes.
CheetahSwitch Workgroup-4508 IP Connectivity Test (Ping) Use the IP Connectivity Test to see if another site on the Internet can be reached. The screen shown below is described in the following table. CheetahSwitch Workgroup - 4508 Network Configuration: IP Connectivity Test (Ping) IP Address : 200.123.211.109 Test Times : 1000 Interval : 1 Success Failure : 1000 : 0 [Start] Use or arrow keys to move. other keys to make changes.
Management Guide HTTP Configuration Use the HTTP Configuration screen to enable/disable the on-board Web agent, and to specify the TCP port that will provide HTTP service. The screen shown below is described in the following table. CheetahSwitch Workgroup - 4508 Network Configuration: HTTP Configuration HTTP Server : ENABLED HTTP Port Number : 80 Use or arrow keys to move. to scroll options.
CheetahSwitch Workgroup-4508 Configuring the Serial Port You can access the on-board configuration program by attaching a VT100 compatible device to the switch's serial port. For more information on connecting to this port, refer to the section on Making the Connections Required for System Configuration on page 9. The communication parameters for this port are accessed from the Serial Port Configuration screen seen below and described in the following table.
Management Guide Assigning SNMP Parameters Use the SNMP Configuration screen to display and modify parameters for the Simple Network Management Protocol (SNMP). The switch includes an on-board SNMP agent which monitors the status of its hardware, as well as the traffic passing through its ports. A computer attached to the network, called a Network Management Station (NMS), can be used to access this information. Access rights to the on-board agent are controlled by community strings.
CheetahSwitch Workgroup-4508 Configuring Community Names The following figure and table describe how to configure the community strings authorized for trap management access. All community strings used for IP Trap Managers must be listed in this table. Up to 5 community names may be entered. CheetahSwitch Workgroup - 4508 SNMP Configuration: SNMP Communities Community Name 1. 2. 3. 4. 5.
Management Guide Parameter IP Address Community Name Status Description IP address of the trap manager. A community specified in the SNMP Communities table. Sets administrative status of entry to enabled or disabled. Console Login Configuration Use the Management Setup: Console Login Configuration to restrict management access based on specified user names and passwords, or to set the invalid password threshold and timeout. There are two user types, Administrator and Guest.
CheetahSwitch Workgroup-4508 Downloading System Software Using TFTP Protocol to Download Over the Network Use the TFTP Download menu to load software updates into the switch. The download file should be an ES4508 binary file from Accton; otherwise the agent will not accept it. The success of the download operation depends on the accessibility of the TFTP server and the quality of the network connection. After downloading the new software, the agent will automatically restart itself.
Management Guide Configuring the Switch The Device Control menu is used to set the communication parameters for individual ports, and to fine-tune the performance of your switch by adjusting the forwarding mode, flow control, and specific Spanning Tree parameters. Configuration menus are also provided for advanced functions, such as Virtual LANs, and port mirroring. Each of the setup screens provided by the configuration menus is described in the following sections.
CheetahSwitch Workgroup-4508 Configuring Port Parameters Use the Port Configuration menus to configure any port on the switch. CheetahSwitch Workgroup - 4508 Port Configuration: Port 1 - 8 Port Type Admin Flow Speed and Control Duplex -----------------------------------------------------1. 1000SX ENABLED ON 1000-FULL 2. 1000SX ENABLED OFF 1000-FULL 3. 1000SX ENABLED ON 1000-FULL 4. 1000SX ENABLED OFF 1000-FULL 5. 1000SX ENABLED ON 1000-FULL 6. 1000SX ENABLED OFF 1000-FULL 7.
Management Guide Viewing the Current Port Configuration The Port Information screen displays the port type, status, link state, and flow control in use. To change any of the port settings, use the configuration menu. CheetahSwitch Workgroup - 4508 Port Information: Port 1 - 8 Port Type Operational Link FlowControl Speed and InUse Duplex InUse ------------------------------------------------------------1. 1000SX YES DOWN 802.3x 1000-FULL 2. 1000SX YES DOWN NONE 1000-FULL 3. 1000SX YES UP 802.
CheetahSwitch Workgroup-4508 Configuring Bridge STA The following figure and table describe Bridge STA configuration. CheetahSwitch Workgroup - 4508 Spanning Tree Configuration: Bridge STA Configuration Spanning Tree Protocol Hello Time Max Age Priority Forward Delay : : : : : ENABLED 2 6 32768 4 Use or arrow keys to move, to scroll options.
Management Guide Configuring STA for Ports The following figure and table describe STA configuration for ports.
CheetahSwitch Workgroup-4508 Viewing the Current Spanning Tree Configuration The Spanning Tree Information screen displays a summary of the STA information for the overall bridge or for a specific port. To make any changes to the parameters for the Spanning Tree, use the Spanning Tree Configuration menu. Also note that this screen cannot be accessed unless you have already enabled the Spanning Tree Algorithm via the STA Bridge Configuration menu.
Management Guide Parameter Hold Time Designated Root Root Cost Root Port Reconfig Counts Topology Up Time Description The minimum interval between the transmission of consecutive Configuration BPDUs. The priority and MAC address of the device in the spanning tree that this switch has accepted as the root device. The path cost from the root port on this switch to the root device. The number of the port on this switch that is closest to the root.
CheetahSwitch Workgroup-4508 Parameter Type Status Description Shows port type as 1000SX (1000BASE-SX). Displays the current state of this port within the spanning tree: Disabled Blocked Listening Learning Forwarding Port has been disabled by the user or has failed diagnostics. Port receives STA configuration messages, but does not forward packets. Port will leave blocking state due to topology change, starts transmitting configuration messages, but does not yet forward packets.
Management Guide Using a Mirror Port for Analysis You can mirror traffic from any source port to a target port for real-time analysis. You can then attach a logic analyzer or RMON probe to the target port and study the traffic crossing the source port in a completely unobtrusive manner. When mirroring port traffic, note that the target port must be included in the same VLAN as the source port. (See Configuring Virtual LANs on page 2-41.
CheetahSwitch Workgroup-4508 Configuring IGMP This protocol allows a host to inform its local switch/router that it wants to receive transmissions addressed to a specific multicast group.
Management Guide Broadcast Storm Control Use the Broadcast Storm Control menu to enable/disable broadcast suppression on a per-port basis. You can also set the packet-per-second threshold above which broadcast packets will be discarded. The parameters are shown in the following figure and table.
CheetahSwitch Workgroup-4508 Configuring Bridge MIB Extensions The Bridge MIB includes extensions for managed devices that support Traffic Classes, Multicast Filtering and Virtual LANs.
Management Guide Configuring Traffic Classes IEEE 802.1p defines up to 8 separate traffic classes. This switch supports Quality of Service (QoS) by using two priority queues, with weighted fair queuing for each port. You can use the 802.1P Configuration menu to configure the default priority for each port, or to display the mapping for the traffic classes as described in the following sections. CheetahSwitch Workgroup - 4508 802.1P Configuration : Selection Menu 802.1P Port Priority Configuration ... 802.
CheetahSwitch Workgroup-4508 802.1p Port Traffic Class Information This switch provides two priority levels with weighted fair queuing for port egress. This means that any frames with a default or user priority from 0~3 are sent to the low priority queue “0” while those from 4~7 are sent to the high priority queue “1” as shown in the following screen: CheetahSwitch Workgroup - 4508 802.
Management Guide Configuring Virtual LANs You can use the VLAN configuration menu to assign any port on the switch to any of up to 16 LAN groups. In conventional networks with routers, broadcast traffic is split up into separate domains. Switches do not inherently support broadcast domains. This can lead to broadcast storms in large networks that handle traffic such as IPX or NetBeui. By using IEEE 802.
CheetahSwitch Workgroup-4508 802.1Q VLAN Current Table Information This screen shows the current port members of each VLAN and whether or not the port supports VLAN tagging. Ports assigned to a large VLAN group that crosses several switches should use VLAN tagging. However, if you just want to create a small port-based VLAN for one or two switches, you can assign ports to the same untagged VLAN. The current configuration is shown in the following screen. CheetahSwitch Workgroup - 4508 802.
Management Guide 802.1Q VLAN Static Table Configuration Use this screen to create a new VLAN or modify the settings for an existing VLAN. Note that all ports can only belong to one untagged VLAN. This is set to VLAN 1 by default, but can be changed via the 802.1Q VLAN Port Configuration screen.
CheetahSwitch Workgroup-4508 For example, the following screen displays settings for VLAN 2, which includes tagged ports 1-6, and forbidden port 8. CheetahSwitch Workgroup - 4508 1Q VLAN Static Table Configuration VID VLAN Name Row Status -----------------------------2 RD Active Egress Ports 11111100 Forbidden Egress Ports 00000001 VID : 2 [Show] [More] [New] Use or arrow keys to move, other keys to make changes. 802.
Management Guide Monitoring the Switch The Network Monitor Menu provides access to port statistics, RMON statistics, IP multicast addresses, and the static (unicast) address table. Each of the screens provided by these menus is described in the following sections. CheetahSwitch Workgroup - 4508 Network Monitor Menu Port Statistics ... RMON Statistics ... Unicast Address Table ... Multicast Address Registration Table ... IP Multicast Registration Table ... Static Unicast Address Table Configuration ...
CheetahSwitch Workgroup-4508 Displaying Port Statistics Port Statistics display key statistics from the Ethernet-like MIB for each port. Error statistics on the traffic passing through each port are displayed. This information can be used to identify potential problems with the switch (such as a faulty port or unusually heavy loading). The values displayed have been accumulated since the last system reboot. The statistics displayed are indicated in the following figure and table.
Management Guide Parameter Carrier Sense Errors1 Description The number of times that the carrier sense condition was lost or never asserted when attempting to transmit a frame. The number of frames received that exceed the maximum permitted frame size. The number of frames for which reception failed due to an internal MAC sublayer receive error. Frames Too Long Internal Mac Receive Errors1 1: The reported values will always be zero because these statistics are not supported by the internal chip set.
CheetahSwitch Workgroup-4508 Parameter Undersize Frames Oversize Frames Fragments Jabbers Collisions 64 Byte Frames 65-127 Byte Frames 128-255 Byte Frames 256-511 Byte Frames 512-1023 Byte Frames 1024-1518 Byte Frames 2-36 Description The total number of frames received that were less than 64 octets long (excluding framing bits, but including FCS octets) and were otherwise well formed.
Management Guide Using the Address Table The Address Table contains the MAC addresses and VLAN identifiier associated with each port (that is, the source port associated with the address and VLAN). The address table provides search options for a specific port, address or VLAN identifier. You can also clear the entire address table, or information associated with a specific port, address, or VLAN identifier; or set the aging time for deleting inactive entries.
CheetahSwitch Workgroup-4508 Displaying the IP Multicast Registration Table Use the IP Multicast Registration Table to display all the multicast groups active on this switch, including multicast IP addresses and the corresponding VLAN ID. CheetahSwitch Workgroup - 4508 IP Multicast Registration Table VID Multicast IP Dynamic Port Lists Learned by --------------------------------------------------------------1 225.1.1.1 10010110 5 225.1.1.
Management Guide Configuring Static Unicast Addresses Use the Static Unicast Address Table Configuration screen to manually configure host MAC addresses in the unicast table. You can use this screen to associate a MAC address with a specific VLAN ID and switch port as shown below.
CheetahSwitch Workgroup-4508 Resetting the System Use the System Restart Menu under the Main Menu to reset the management agent. The reset screen also includes an option to return all configuration parameters to their factory defaults. CheetahSwitch Workgroup - 4508 System Restart Menu Restart Option : POST Reload Factory Defaults Keep IP Setting Keep User Authentication : : : : NO NO NO NO [Restart] Use or arrow keys to move, to scroll options.
Chapter 3: Using the Web Agent As well as the menu-driven system configuration program, the CheetahSwitch Workgroup-4508 provides an embedded HTTP Web agent. This agent can be accessed by any computer on the network using a standard Web browser (Internet Explorer 4.0 or above, or Netscape Navigator 4.0 or above). Using the Web browser management interface you can configure the switch and view statistics to monitor network activity.
CheetahSwitch Workgroup-4508 Home Page When your Web browser connects with the switch’s Web agent, the home page is displayed as shown below. The home page displays the Main Menu on the lefthand side of the screen and the System Information on the right-hand side. The Main Menu links are used to navigate to other menus and display configuration parameters and statistical data. Configurable parameters have a dialog box or a drop-down list.
Management Guide Panel Display The Web Agent displays an image of the switch’s ports, showing port link and activity. Clicking on the image of a port displays statistics and configuration information for the port. Clicking on the image of the serial port (labelled “Mgmt”) displays the Console Configuration screen. Console Configuration Click on the serial port icon in the switch image to display and configure the out-ofband serial port connection, as shown in the following figure and table.
CheetahSwitch Workgroup-4508 Main Menu Using the on-board Web agent, you can define system parameters, manage and control the switch and all its ports, or monitor network conditions. The figure to the right of the Main Menu and the following table briefly describe the selections available from this program. Item System Switch IP SNMP Security Upgrade Address STA Description Provides basic system description, including contact information. Shows hardware/firmware version numbers and power status.
Management Guide System Information Use the System Information screen to display descriptive information about the switch, or for quick system identification as shown in the following figure and table. Parameter System Name1 IP Address2 System Object ID Location1 Contact1 System Uptime Description Name assigned to the switch system. IP address of the SNMP agent. The management agent supports SNMP over UDP/IP transport protocol.
CheetahSwitch Workgroup-4508 Switch Information Use the Switch Information screen to display hardware/firmware version numbers for the main board and SNMP agent, as well as the power status. Main Board Parameter Hardware Version POST Version Firmware Version Port Number Serial Number1 Internal Power Status1 Redundant Power Status1 Description Hardware version of the main board. System POST version. Version number of the system firmware in ROM. Number of ports. Serial number of the main board.
Management Guide Network Configuration Use the IP Configuration screen to set the bootup option, configure the Ethernet IP addresses for the agent module, or set the number or concurrent Telnet sessions allowed. The Access Host screen can be used to limit access to the Web management agent to specified subnet groups. IP Configuration Use the IP Configuration screen to set the bootup option, configure the Ethernet IP addresses for the agent module, or set the number or concurrent Telnet sessions allowed.
CheetahSwitch Workgroup-4508 Access Host Use the Access Host screen to specify subnet groups from which the switch’s management agent can be accessed. The screen shown below is described in the following table. Parameter Access IP Net Access IP Mask Add/Remove Description An IP address of a subnet authorized for management access. A subnet mask that identifies the host address bits of the subnet. Add/remove strings from the active list.
Management Guide SNMP Community The following figure and table describe how to configure the community strings authorized for trap management access. All community strings used for IP Trap Managers must be listed in this table. Up to 5 community names may be entered. Parameter Community String Access Mode Add/Remove Description A community entry authorized for trap management access. (The maximum string length is 20 characters). Management access is restricted to Read Only or Read/Write.
CheetahSwitch Workgroup-4508 Security Configuration Use the Security Configuration screen to restrict management access based on Administrator user name and password. Only the Administrator has write access for parameters governing the SNMP agent. You should therefore assign a password to the Administrator as soon as possible, and store it in a safe place.
Management Guide Parameter File Name Start Web Upload Description The ES4508 binary file to download. Use the Browse button to locate the firmware file. Issues request to TFTP server to download the specified file. TFTP Download Management Use the TFTP Download Management menu to load software updates into the switch. The download file should be an ES4508 binary file from Accton; otherwise the agent will not accept it.
CheetahSwitch Workgroup-4508 Address Table Configuration The Address Table contains the MAC addresses associated with each port (that is, the source port associated with the address). The address table provides search options for a specific port or address. You can also clear the entire address table, or information associated with a specific port or address; or set the aging time for deleting inactive entries. The information displayed in the Address Table is indicated in the following figure and table.
Management Guide STA (Spanning Tree Algorithm) The Spanning Tree Algorithm can be used to detect and disable network loops, and to provide backup links between switches, bridges or routers. This allows the switch to interact with other bridging devices (that is, STA compliant switch, bridge or router) in your network to ensure that only one route exists between any two stations on the network. For a more detailed description of how to use this algorithm, refer to “Spanning Tree Algorithm” in Chapter 4.
CheetahSwitch Workgroup-4508 Ports The parameters shown in the following figure and table are for port STA Information. Parameter Port Status Description Displays the current state of this port within the spanning tree: Disabled Blocked Port has been disabled by the user or has failed diagnostics. Port receives STA configuration messages, but does not forward packets.
Management Guide Spanning Tree Configuration The following figures and tables describe Bridge STA configuration. Switch Parameter Default Description Usage Enabled Priority 32,768 Enable this parameter to participate in an STA compliant network. Device priority is used in selecting the root device, root port, and designated port. The device with the highest priority becomes the STA root device.
CheetahSwitch Workgroup-4508 Parameter Default Description Forward Delay 15 The maximum time (in seconds) the root device will wait before changing states (i.e., listening to learning to forwarding). This delay is required because every device must receive information about topology changes before it starts to forward frames. In addition, each port needs time to listen for conflicting information that would make it return to a blocking state; otherwise, temporary data loops might result.
Management Guide Parameter Default Description Fast STA Mode Disabled This enables/disables the Fast STA Mode for the port. In this mode, ports skip the Blocked, Listening and Learning states and proceed straight to Forwarding. The Fast STA Mode enables end-node workstations and servers to overcome time-out problems when the Spanning Tree Algorithm is implemented in a network. Therefore, the Fast STA Mode should only be enabled for ports that are connected to an end-node device.
CheetahSwitch Workgroup-4508 Bridge Settings Parameter Traffic Class Description Multiple traffic classes are supported by this switch as indicated under Bridge Capabilities. However, the switch supports just two priority queues and only the default port priority can be configured. The switch does not support the configuration of traffic class mapping. Therefore, this parameter under Bridge Settings is set to disabled and cannot be enabled. Note: This switch does not support GMRP or GVRP.
Management Guide Parameter Port Default Ingress User Priority Description Numeric identifier for switch port. Default priority can be set to any value from 0~7, where 0~3 specifies the low priority queue and 4~7 specifies the high priority queue. Number of Egress Traffic Classes Indicates that this switch supports two priority output queues. Port Traffic Class Information This switch provides two priority levels with weighted fair queuing for port egress.
CheetahSwitch Workgroup-4508 Configuring VLANs Use the VLAN menu to create LAN groups and assign switch ports to any of up to 16 groups. In conventional networks with routers, broadcast traffic is split up into separate domains. Switches do not inherently support broadcast domains. This can lead to broadcast storms in large networks that handle a lot of IPX traffic. By using IEEE 802.
Management Guide VLAN Current Table This screen shows the current port members of each VLAN and whether or not the port supports VLAN tagging. Ports assigned to a large VLAN group that crosses several switches should use VLAN tagging. However, if you just want to create a small port-based VLAN for one or two switches, you can assign ports to the same untagged VLAN. The current configuration is shown in the following screen.
CheetahSwitch Workgroup-4508 VLAN Static List Use this screen to create or remove VLAN groups. Parameter Current New Status Add Remove Description Lists all the current VLAN groups created for this system. Up to 16 VLAN groups can be defined. To allow this switch to participate in external VLAN groups, you must use the VLAN ID for the concerned external groups. Allows you to specify the name and numeric identifier for a new VLAN group.
Management Guide Use the screens shown below to assign ports to the specified VLAN group as an IEEE 802.1Q tagged port. Assign ports as tagged if they are connected to 802.1Q VLAN compliant devices. If the port is connected to VLAN-unaware devices, frames will passed to the untagged VLAN group this port has been assigned to under VLAN Port Configuration. Parameter Egress Ports Forbidden Egress Ports Description Adds ports to the specified VLAN.
CheetahSwitch Workgroup-4508 VLAN Port Configuration Use this screen to configure port-specific settings for IEEE 802.1Q VLAN features. Parameter PVID Acceptable Frame Type Ingress Filtering Description The VLAN ID assigned to untagged frames received on this port. Use the PVID to assign ports to the same untagged VLAN. This switch accepts “All” frame types, including VLAN tagged or VLAN untagged frames. Note that all VLAN untagged frames received on this port are assigned to the PVID for this port.
Management Guide IGMP Multicast Filtering Multicasting is used to support real-time applications such as video conferencing or streaming audio. A multicast server does not have to establish a separate connection with each client. It merely broadcasts its service to the network, and any hosts which want to receive the multicast register with their local multicast switch/router.
CheetahSwitch Workgroup-4508 IP Multicast Registration Table Use the IP Multicast Registration Table to display all the multicast groups active on this switch, including multicast IP addresses and the corresponding VLAN ID. Parameter VLAN ID Multicast IP Address Dynamic Port List Description VLAN ID assigned to this multicast group. IP address for specific multicast services. The switch ports registered for the indicated multicast service.
Management Guide Parameter Admin Status Link Status Speed Status Duplex Status Flow Control Status Description Shows if the port is enabled or not. Indicates if the port has a valid connection to an external device. Indicates that the port is connected at 1000 Mbps.. Indicates that the port is connected at full duplex. Shows if flow control is in use. Flow control can eliminate frame loss by “blocking” traffic from end stations connected directly to the switch. Standard IEEE 802.
CheetahSwitch Workgroup-4508 Port Mirroring Configuration You can mirror the traffic from a target port to an analysis port for real-time analysis. You can then attach a logic analyzer or RMON probe to the analysis port and study the traffic crossing target port in a completely unobtrusive manner. When mirroring a port, note that the analysis port must be included in the same VLAN as the monitored port.
Management Guide Parameter Alignment Errors FCS Errors Single Collision Frames1 Multiple Collision Frames1 SQE Test Errors1 Deferred Transmissions1 Late Collisions Excessive Collisions1 Internal Mac Transmit Errors1 Carrier Sense Errors1 Frames Too Long Internal Mac Receive Errors1 Description For 10 Mbps ports, this counter records alignment errors (missynchronized data packets). For 100 Mbps ports, this counter records the sum of alignment errors and code errors (frames received with rxerror signal).
CheetahSwitch Workgroup-4508 RMON Statistics RMON Statistics display key statistics for each port or media module from RMON group 1. (RMON groups 2, 3 and 9 can only be accessed using SNMP management software such as AccView.) The following screen displays overall statistics on traffic passing through each port. RMON statistics provide access to a broad range of statistics, including a total count of different frame types passing through each port.
Management Guide Parameter Jabbers Collisions 64 Byte Frames 65-127 Byte Frames 128-255 Byte Frames 256-511 Byte Frames 512-1023 Byte Frames 1024-1518 Byte Frames Description The total number of frames received that were longer than 1518 octets (excluding framing bits, but including FCS octets), and had either an FCS or alignment error. The best estimate of the total number of collisions on this Ethernet segment.
CheetahSwitch Workgroup-4508 Broadcast Storm Control Use the Broadcast Storm Control page to enable/disable broadcast suppression on a per-port basis. You can also set the broadcast-rate threshold above which broadcast packets will be discarded. The parameters are shown in the following figure and table. Parameter Filtering Status Filtering Threshold 3-32 Description Enables/disables Broadcast Storm Control for the port.
Chapter 4: Advanced Topics Spanning Tree Algorithm The Spanning Tree Algorithm (that is, the STA configuration algorithm as outlined in IEEE 802.1D) can be used to detect and disable network loops, and to provide link backup. This allows the switch to interact with other bridging devices (including STA compliant switches, bridges or routers) in your network to ensure that only one route exists between any two stations on the network.
CheetahSwitch Workgroup-4508 Virtual LANs Switches do not inherently support broadcast domains, which can lead to broadcast storms in large networks that handle a lot of IPX or NetBeui traffic. In conventional networks with routers, broadcast traffic is split up into separate domains to confine broadcast traffic to the originating group and provide a much cleaner network environment. By supporting VLANs, this switch allows you to create segregated broadcast domains.
Management Guide VLAN Classification When the switch receives a frame, it classifies the frame in one of two ways: • If the frame is untagged, the switch assigns the frame to an associated VLAN (based on the PVID of the receiving port). • If the frame is tagged, the switch uses the tagged VLAN ID to identify the port broadcast domain of the frame. Port Overlapping Port overlapping can be used to allow access to commonly shared network resources among different VLAN groups, such as file servers or printers.
CheetahSwitch Workgroup-4508 Forwarding Traffic with Unknown VLAN Tags Up to 2048 VLANs are supported by the IEEE 802.1Q protocol, but this switch only supports 16 VLANs. Therefore, if this switch is attached to any device that forwards frames with unknown VLAN tags, or to endstations which issue VLAN registration requests for unknown VLANs, this traffic will be dropped.
Management Guide The purpose of IP multicast filtering is to optimize a switched network’s performance, so multicast packets will only be forwarded to those ports containing multicast group hosts or multicast routers/switches instead of flooding to all ports in the subnet (VLAN).
CheetahSwitch Workgroup-4508 Statistics: Includes all the tools needed to monitor your network for common errors and overall traffic rates. Information is provided on bandwidth utilization, peak utilization, packet types, errors and collisions, as well as the distribution of packet sizes. History: Can be used to create a record of network utilization, packet types, errors and collisions. You need a historical record of activity to be able to track down intermittent problems.
Appendix A: Troubleshooting Refer to the Quick Installation Guide for a more detailed listing of troubleshooting procedures. However, if you have trouble making a connection to the agent module, then please refer to the following section. Console Connection If you cannot access the on-board configuration program via a serial port, be sure to have set the terminal emulator program to VT100 compatible, 8 data bits, 1 stop bit, no parity and 19200 bps.
CheetahSwitch Workgroup-4508 (c)Copyright 2000, Accton Inc. CheetahSwitch Workgroup-4508 LOADER Version V01.00.01 POST Version V01.00.01 ------ Performing the Power-On Self Test (POST) -----EPROM Checksum Test ....................... PASS Testing the System SDRAM .................. PASS CPU Self Test ............................. PASS EEPROM Checksum Test ...................... PASS SEEPROM Checksum Test ..................... PASS MAC Address ..............
Appendix B: Pin Assignments DB9 Serial Port Pin Description The DB9 serial port on the switch’s rear panel is used to connect the switch to a management device. The on-board menu-driven configuration program can be accessed from a terminal, a PC running a terminal emulation program, or from a remote location via a modem connection. You can use the management port to configure port settings (e.g., enabled or disabled), or to update device firmware.
CheetahSwitch Workgroup-4508 Connection from Switch's Serial Port to Modem's 25-Pin DCE Port Switch's 9-Pin Serial Port 1 2 3 4 5 6 7 8 9 Modem's 25Pin COM Port <------ DCD ------- 8 <------ RXD ------- 3 -------- TXD ------> 2 -------- DTR ------> 20 -------- SGND ----- 7 <------ DSR ------- 6 -------- RTS ------> 4 <------ CTS ------- 5 <------ RI ------22 CCITT Signal Connection from Switch's Serial Port to PC's 25-Pin DTE Port Switch's 9-Pin Serial Port 1 DCD 2 RXD 3 TXD 4 DTR 5 SGND 6 DSR 7 RTS 8 CTS
ES4508 E022000-R01 150065-102
