Cisco 2950G 24 Software Configuration Guide - Page 130
Candidate Switch and Member Switch Characteristics
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Understanding Switch Clusters Chapter 6 Clustering Switches Note Catalyst 2950 command switches running Release 12.1(9)EA1 or later can connect to standby command switches in the 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. - When the command switch is a Catalyst 2950 switch running Release 12.1(6)EA2 or later, all standby command switches must be Catalyst 2950 switches running Release 12.1(6)EA2 or later. - When the command switch is running Release 12.0(5)WC2 or earlier, the standby command switches can be these switches: Catalyst 2900 XL, Catalyst 2950, and Catalyst 3500 XL switches. • We strongly recommend that the command switch and standby command switches are of the same switch platform. - If you have a Catalyst 3550 command switch, the standby command switches should be Catalyst 3550 switches. - If you have a Catalyst 2950 command switch, the standby command switches should be Catalyst 2950 switches. - If you have a Catalyst 2900 XL or Catalyst 3500 XL command switch, the standby command switches should be Catalyst 2900 XL and Catalyst 3500 XL switches. Candidate Switch and Member Switch Characteristics Candidate switches are cluster-capable switches that have not yet been added to a cluster. Member switches are switches that have actually been added to a switch cluster. Although not required, a candidate or member switch can have its own IP address and password (for related considerations, see the "IP Addresses" section on page 6-15 and "Passwords" section on page 6-16). To join a cluster, a candidate switch must meet these requirements: • It is running cluster-capable software. • It has CDP version 2 enabled. • It is not a command or member switch of another cluster. • If the Catalyst 2950 member or candidate switch is running Release 12.1(9)EA1 or later, it is connected to the command switch through at least one common VLAN. • If the Catalyst 2950 member or candidate switch is running a release earlier than Release 12.1(9)EA1, it is connected to the command switch through the command-switch management VLAN. Catalyst 2950 Desktop Switch Software Configuration Guide 6-4 78-14982-01