Discovery Through Different Management Vlans - Cisco 2950 - Catalyst Switch Configuration Manual

Chapter 7 Clustering Switches

Discovery through Different Management VLANs

We recommend using as a command switch a Catalyst 3550 switch, a Catalyst 2955 switch, a
Catalyst 2950 LRE switch, a non-LRE Catalyst 2950 switch running Cisco IOS Release 12.1(9)EA1 or
later, or a Catalyst 2940 switch. These command switches can discover and manage member switches in
different VLANs and different management VLANs. As cluster member switches, they must be
connected through at least one VLAN in common with the cluster command switch. They do not need
to be connected to the cluster command switch through their management VLAN. All other member
switches must be connected to the command switch through their management VLAN.
In contrast, a Catalyst 2900 XL command switch, a non-LRE Catalyst 2950 command switch running a
release earlier than Cisco IOS 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
The cluster command switch and standby command switch in
recommended command and standby switches) have ports assigned to VLANs 9, 16, and 62. The
management VLAN on the cluster command switch is VLAN 9. Each cluster command switch discovers
the switches in the different management VLANs except these:
•
•
Figure 7-5
(management
78-11380-10
"Discovery through the Same Management VLAN" section on page
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 cluster command switch
Switch 9 because automatic discovery does not extend beyond a noncandidate device, which is
switch 7
Discovery through Different Management VLANs
Command
switch
VLAN 16
Switch 3
VLAN 16)
VLAN 16
Switch 4
(management
VLAN 16)
Standby command
switch
VLAN 9
VLAN 62
Switch 5
(management
VLAN 62)
VLAN trunk 4, 62
Switch 7
(management
VLAN 4)
VLAN 62
Switch 9
(management
VLAN 62)
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
Planning a Switch Cluster
7-8.
Figure 7-5 (assuming they are
VLAN 9
Switch 6
(management
VLAN 9)
VLAN 9
Switch 8
(management
VLAN 9)
VLAN 4
Switch 10
(management
VLAN 4)
7-9