Command Switch Characteristics; Standby Command Switch Characteristics - Cisco Catalyst 2950 Software Configuration Manual

Chapter 6 Clustering Switches

Command Switch Characteristics

A Catalyst 2950 command switch must meet these requirements:
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The CMP-NAT-ACL access list is created when a device is configured as the command switch.
Note
Configuring any other access list on the switch can restrict access to it and affect the discovery of
member and candidate switches.
Note •

Standby Command Switch Characteristics

A Catalyst 2950 standby command switch must meet these requirements:
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Note Catalyst 2950 command switches running Release 12.1(9)EA1 or later can connect to standby command
switches in different management VLANs.
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It is running Release 12.0(5.2)WC(1) 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.
If the Catalyst 2950 command switch is running Release 12.1(9)EA1 or later, it is connected to the
standby command switches and member switches through a common VLAN.
If the Catalyst 2950 command switch is running a release earlier than Release 12.1(9)EA1, it is
connected to the standby command switches and member switches through its management VLAN.
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.
It is running Release 12.0(5.2)WC(1) or later.
It has an IP address.
It has CDP version 2 enabled.
If the Catalyst 2950 standby command switch is running Release 12.1(9)EA1 or later, it is connected
to the command switch and all other standby command switches through at least one common
VLAN.
If the Catalyst 2950 standby command switch is running a release earlier than Release 12.1(9)EA1,
it is connected to the command switch and to other standby command switches and member switches
through its management VLAN.
Catalyst 2950 Desktop Switch Software Configuration Guide
Understanding Switch Clusters
6-3