Cisco WS-C2960-24TT-L Software Guide - Page 109
Discovery through Different Management VLANs,
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Chapter 5 Clustering Switches Planning a Switch Cluster Discovery through Different Management VLANs We recommend using a Catalyst 3550 command switch or a Catalyst 2950 command switch running Release 12.1(9)EA1 or later. These command switches can discover and manage member switches in different VLANs and different management VLANs. Catalyst 3550 member switches and Catalyst 2950 member switches running Release 12.1(9)EA1 or later must be connected through at least one VLAN in common with the command switch. All other member switches must be connected to the command switch through their management VLAN. In contrast, 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 information about discovery through the same management VLAN on these switches, see the "Discovery through the Same Management VLAN" section on page 5-8. The Catalyst 2950 command switch (running Release 12.1(9)EA1 or later) in Figure 5-4 and the Catalyst 3550 command switch in Figure 5-5 have ports assigned to VLANs 9, 16, and 62. The management VLAN on the Catalyst 2950 command switch is VLAN 9. Each command switch discovers the switches in the different management VLANs except these: • Switches 7 and 10 (switches in management VLAN 4) because they are not connected through a common VLAN (meaning VLANs 62 and 9) with the command switch • Switch 9 because automatic discovery does not extend beyond a noncandidate device, which is switch 7 Figure 5-4 Discovery through Different Management VLANs with a Layer 2 Command Switch Catalyst 2950 command switch Catalyst 2950 standby command switch VLAN 16 Switch 3 (management VLAN 16) VLAN 16 (management VLAN 9) VLAN 62 Switch 5 (management VLAN 62) VLAN trunk 4, 62 VLAN 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 16) Switch 7 (management VLAN 4) VLAN 62 Switch 9 (management VLAN 62) Switch 8 (management VLAN 9) VLAN 4 Switch 10 (management VLAN 4) 74049 78-6511-08 Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration Guide 5-9