Cisco WS-C2960S-24PD-L Software Guide - Page 108
Discovery through the Same Management VLAN,
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Planning a Switch Cluster Chapter 5 Clustering Switches Discovery through the Same Management VLAN A Catalyst 2900 XL command switch, a Catalyst 2950 command switch running a release earlier than Release 12.1(9)EA1, or a Catalyst 3500 XL command switch must connect to all cluster members through its management VLAN. The default management VLAN is VLAN 1. For more information about management VLANs, see the "Management VLAN" section on page 5-18. Note You can avoid this limitation by using, whenever possible, a Catalyst 3550 command switch or a Catalyst 2950 command switch running Release 12.1(9)EA1 or later. These command switches can manage cluster members even if they belong to different management VLANs. See the "Discovery through Different Management VLANs" section on page 5-9. The command switch in Figure 5-3 has ports assigned to management VLAN 9. It discovers all but these switches: • Switches 7 and 10 because their management VLAN (VLAN 4) is different from the command-switch management VLAN (VLAN 9) • Switch 9 because automatic discovery does not extend beyond a noncandidate device, which is switch 7 Figure 5-3 Discovery through the Same Management VLAN Catalyst 2900 XL, Catalyst 2950, or Catalyst 3500 XL command and standby command switches Command switch Standby command switch VLAN 9 VLAN 9 VLAN 9 VLAN 9 Switch 3 (management VLAN 9) VLAN 9 Switch 5 (management VLAN 9) VLAN trunk 4, 9 Switch 6 (management VLAN 9) VLAN 9 Catalyst 1900, Catalyst 2820, Catalyst 2900 XL, Catalyst 2950, and Catalyst 3500 XL switches Switch 4 (management VLAN 9) Switch 7 (management VLAN 4) VLAN 9 Switch 9 (management VLAN 9) Switch 8 (management VLAN 9) VLAN 4 Switch 10 (management VLAN 4) 65277 Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration Guide 5-8 78-6511-08