Cisco WS-C2960S-24PD-L Software Guide - Page 114

Planning a Switch Cluster Chapter 5 Clustering Switches • All standby-group members must be members of the cluster. Note There is no limit to the number of switches that you can assign as standby command switches. However, the total number of switches in the cluster-which would include the active command switch, standby-group members, and member switches-cannot be more than 16. • Each standby-group member (Figure 5-7) must be connected to the command switch through its management VLAN. Each standby-group member must also be redundantly connected to each other through the management VLAN. Catalyst 1900, Catalyst 2820, Catalyst 2900 XL, Catalyst 2950, and Catalyst 3500 XL member switches must be connected to the cluster standby group through their management VLANs. For more information about VLANs in switch clusters, see these sections: - "Discovery through the Same Management VLAN" section on page 5-8 - "Discovery through Different Management VLANs" section on page 5-9 Figure 5-7 VLAN Connectivity between Standby-Group Members and Cluster Members Catalyst 3550 active command switch Catalyst 3550 passive command switch Catalyst 3550 standby command switch VLANs 9,16 Si Si VLANs 9,16 Si VLAN 9 Catalyst 3550 switch Management VLAN 9 VLAN 9 VLAN 9 Management VLAN 16 Catalyst 2950 switch Management VLAN 16 Catalyst 2900 XL or Catalyst 3500 XL switch VLAN 16 Catalyst 3550 Si multilayer switch Member switches 65280 5-14 Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration Guide 78-6511-08