Cisco WS-C2960S-24PD-L Software Guide - Page 103
Command Switch Characteristics, Standby Command Switch Characteristics
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Chapter 5 Clustering Switches Understanding Switch Clusters Command Switch Characteristics A Catalyst 2900 XL or Catalyst 3500 XL command switch must meet these requirements: • It is running Release 12.0(5)XP or later. • It has an IP address. • It has Cisco Discovery Protocol (CDP) version 2 enabled (the default). • It is not a command or member switch of another cluster. • It is connected to the standby command switches and member switches through its management VLAN. Note The access class 199 access list is created when a device is configured as the command switch. Configuring any other access list on the switch can restrict access to it and affect the discovery of member and candidate switches. Note • We strongly recommend that the highest-end, command-capable switch in the cluster be the command switch: - If your switch cluster has a Catalyst 3550 switch, that switch should be the command switch. - If your switch cluster has Catalyst 2900 XL, Catalyst 2950, and Catalyst 3500 XL switches, the Catalyst 2950 should be the command switch. - If your switch cluster has Catalyst 1900, Catalyst 2820, Catalyst 2900 XL, and Catalyst 3500 XL switches, either the Catalyst 2900 XL or Catalyst 3500 XL should be the command switch. Standby Command Switch Characteristics A Catalyst 2900 XL or Catalyst 3500 XL standby command switch must meet these requirements: • It is running Release 12.0(5)XP or later. • It has an IP address. • It has CDP version 2 enabled. • It is connected to the command switch and to other standby command switches and member switches through its management VLAN. • It is redundantly connected to the cluster so that connectivity to member switches is maintained. • It is not a command or member switch of another cluster. Note • Standby command switches must meet these requirements: - When the command switch is a Catalyst 3550 switch, all standby command switches must be Catalyst 3550 switches. - When the command switch is a Catalyst 2950 switch running Release 12.1(9)EA1 or later, all standby command switches must be Catalyst 2950 switches running Release 12.1(9)EA1 or later. 78-6511-08 Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration Guide 5-3