SmartTrunk User’s Guide 9032680
Notice Notice Cabletron Systems reserves the right to make changes in speciÞcations and other information contained in this document without prior notice. The reader should in all cases consult Cabletron Systems to determine whether any such changes have been made. The hardware, Þrmware, or software described in this manual is subject to change without notice.
Notice FCC Notice This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC rules.
Notice Declaration of Conformity Addendum Application of Council Directive(s): 89/336/EEC 73/23/EEC ManufacturerÕs Name: Cabletron Systems, Inc. ManufacturerÕs Address: 35 Industrial Way European Representative Name: European Representative Address: Conformance to Directive(s)/Product Standards: Equipment Type/Environment: PO Box 5005 Rochester, NH 03867 Mr. J.
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Contents Chapter 1 Introduction SmartTrunking............................................................................................................... 1-1 Packet Distribution ....................................................................................................... 1-2 Compatibility - DEC Hunt Groups and GigaSwitch Router (GSR) ..................................................................................... 1-3 Chassis with Multiple SmartTrunk Groups ...............................
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Chapter 1 Introduction Traditional 802.1D Spanning Tree Bridges only allow one active data path between any two switches; all other parallel data paths are in Standby or Blocking mode. If one interface or path should fail, then the other interface automatically comes out of Blocking mode and forwards all of the trafÞc. This is Þne for redundancy purposes. However, it is not the most efÞcient use of resources.
Introduction Packet Distribution Packet distribution is based on hardware family type: MultiSwitch 700 Packet distribution among the ports in the group is accomplished by adding the destination and source MAC addresses and then applying the modulus operator to the sum using the number of active ports in the group. The remainder, which falls into the range of the number of ports in the group, will dictate which port will be used by the address.
Introduction Compatibility - DEC Hunt Groups and GigaSwitch Router (GSR) SmartTrunking for the MultiSwitch 700 is based on, and compatible with, DEC Hunt Groups. Adopting the DEC Hunt Groups protocol allows the MultiSwitch 700 to be trunked together with the GigaSwitch Router (GSR) and other DEC equipment supporting this feature. (See the Þrmware release notes for the compatibility of the individual image selected).
Introduction Users MultiSwitch 700 Chassis #2 MultiSwitch 700 Users MultiSwitch 700 9C106 SmartMIM-216 9C106 SmartMIM-216 Group B Group B on Chassis #2 MultiSwitch 700 Chassis #1 Both Groups on Chassis #1 Group A MultiSwitch 700 Chassis #3 MultiSwitch 700 9C106 SmartMIM-216 Group A on Chassis #3 Users Figure 1-1.
Introduction MultiSwitch 700 Chassis MultiSwitch 700 SmartMIM-216 MultiSwitch 700 Chassis MultiSwitch 700 9C106 SmartMIM-216 SmartMIM-216 9C106 SmartMIM-216 SmartTrunk connections blocked MultiSwitch 700 Chassis MultiSwitch 700 SmartMIM-216 9C106 SmartMIM-216 Figure 1-2. SmartTrunk with a Network Loop Port costs are considered by SmartTrunk when disabling a looped conÞguration. SmartTrunk will place the higher path costs of the group interfaces into a blocked state.
Introduction Active Trunk Links The number of links participating in the trunking group. If all the ports in the trunking group are the same speed and conÞgured to the same duplex mode, the equation is: 1000 -----Speed x # of ports If the ports in the trunking group are different speeds, the equation is: 1000 -----Speed 1 + Speed 2 + Speed 3 + Speed n...
Introduction NOTES When this conÞguration is used, only one moduleÕs SmartTrunk Group will be active. The second path will block and serve as a backup to the currently active path. (The active trunking path will be determined by the module providing the lowest path cost.) Refer to the release notes for image-speciÞc restrictions while using SmartTrunking. NOTE The only time path cost is calculated is when a port is added or removed from the trunking group.
Introduction Getting Help Contact your Digital representative for technical support. Before calling, having the following information ready: 1-8 ¥ A description of the failure ¥ A description of any action(s) already taken to resolve the problem (e.g., changing mode switches, rebooting the unit, etc.) ¥ A description of your network environment (layout, cable type, etc.) ¥ Network load and frame size at the time of the trouble (if known) ¥ The device history (i.e.
Chapter 2 SmartTrunk Configuration Prior to entering information in the SmartTrunking ConÞguration Screen, you should understand the concept of SmartTrunk (see Chapter 1) and the SmartTrunk ConÞguration Rules. SmartTrunk Configuration Rules The following rules apply when conÞguring ports for SmartTrunking. NOTE Failure to follow these rules will produce poor network performance. 1. SmartTrunking ports should be conÞgured to Full Duplex. 2.
SmartTrunk Configuration 7. An end station plugged directly into a port conÞgured for SmartTrunking will not be allowed to communicate. No trafÞc will ßow into the port. 8. The same SmartTrunk group cannot be split onto two separate modules (see Figures 2-1 and 2-2). MultiSwitch 700 9C106 SmartMIM-216 Group A MultiSwitch 700 MultiSwitch 700 9C106 SmartMIM-216 9C106 SmartMIM-216 Figure 2-1.
SmartTrunk Configuration SmartTrunking Configuration Screen To select the SmartTrunking ConÞguration Screen from the Module ConÞguration Menu: 1. Use the arrow keys to highlight the SmartTrunking ConÞguration option. 2. Press the ENTER key. The SmartTrunking ConÞguration Screen, Figure 2-3, appears. DLE22-MA LOCAL MANAGEMENT SmartTrunking Configuration Device Type: DLE22-MA Firmware Revision: XX.XX.XX BOOTPROM Revision: XX.XX.
SmartTrunk Configuration SmartTrunk State (Toggle) Used to enable or disable SmartTrunking for all groups deÞned on the device. ¥ ¥ ¥ ¥ ENABLE - Select to change state to On ENABLED - Currently On DISABLE - Select to change state to Off DISABLED - Currently Off Add/Remove Group A user-deÞned 32-character string describing the group of SmartTrunk ports. Group Is either of the following: ¥ ADD - Create a SmartTrunk Group Name. The name Þeld will become empty, awaiting user input.
SmartTrunk Configuration After making modiÞcations, you must select the SAVE command to save your changes. The NEXT and PREVIOUS commands will be displayed when there are more than 18 ports. ¥ To access ports on the device not seen on the primary screen, use the arrow keys to highlight the NEXT command at the bottom of the screen, then press the Return key. ¥ To view the previous screen of ports, use the arrow keys to highlight the PREVIOUS command at the bottom of the screen, then press the Return key.
SmartTrunk Configuration 2-6
Appendix A Helpful Hints for Configuring SmartTrunk NOTE This procedure must be completed on both switches participating in Trunking. 1. Navigate through Local Management to the SmartTrunking ConÞguration Screen. 2. Using the arrow keys, move the cursor to the Add/Remove Group Þeld. 3. Type the name of the SmartTrunk group you wish to create. 4. Highlight the SAVE command, and then press the Return key. NOTE The group must be created and saved prior to adding ports to the group. 5.
Helpful Hints for Configuring SmartTrunk 9. After all ports have been added, highlight the SmartTrunk State Þeld. Press the Spacebar to select ENABLED. NOTE In order to minimize the interruption to network trafÞc while trunking is being conÞgured, it is recommended that a port between the switches remains outside the group until the trunking links are active. As soon as you enable a trunking group on one end of the trunk, all trafÞc will stop until the other end of the trunk is enabled.
Removing an Entire Trunk Group Removing an Entire Trunk Group To remove an entire trunk Group: 1. Using the arrow keys, highlight the Group: [ADD/DELETE] Þeld (on the same line as the Add/Remove Group Þeld). Press the Spacebar to select [DELETE]. 2. If the name of the group to be deleted doesnÕt appear on the Add/Remove Group Þeld, type the name of the SmartTrunk group you wish to delete. It is also possible to use the Display Group Þeld to toggle through existing groups.
Helpful Hints for Configuring SmartTrunk A-4
