Discovery Through Different Management Vlans - Cisco 2950G 24 - Catalyst Switch Software Configuration Manual

Chapter 6 Clustering Switches

Discovery through Different Management VLANs

We recommend using a Catalyst 3550 command switch or a Catalyst 2950 command switch running
Release 12.1(9)EA1 or later. These command switches can discover and manage member switches in
different VLANs and different management VLANs. Catalyst 3550 member switches and Catalyst 2950
member switches running Release 12.1(9)EA1 or later must be connected through at least one VLAN in
common with the command switch. All other member switches must be connected to the command
switch through their management VLAN.
In contrast, a Catalyst 2900 XL command switch, a Catalyst 2950 command switch running a release
earlier than 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
Same Management VLAN" section on page
The Catalyst 2950 command switch (running Release 12.1(9)EA1 or later) in
Catalyst 3550 command switch in
management VLAN on the Catalyst 2950 command switch is VLAN 9. Each command switch discovers
the switches in the different management VLANs except these:
•
•
Figure 6-5
Catalyst 2900 XL,
Catalyst 2950, and
Catalyst 3500 XL
78-14982-01
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 command switch
Switch 9 because automatic discovery does not extend beyond a noncandidate device, which is
switch 7
Discovery through Different Management VLANs with a Layer 2 Command Switch
Switch 3
(management
VLAN 16)
VLAN 16
Catalyst 1900,
Catalyst 2820,
Switch 4
(management
VLAN 16)
switches
6-8.
Figure 6-6 have ports assigned to VLANs 9, 16, and 62. The
Catalyst 2950
command switch
(management
VLAN 9)
VLAN 16
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 Desktop Switch Software Configuration Guide
Planning a Switch Cluster
"Discovery through the
Figure 6-5 and the
Catalyst 2950
standby command switch
VLAN 9
Switch 6
(management
VLAN 9)
VLAN 9
Switch 8
(management
VLAN 9)
VLAN 4
Switch 10
(management
VLAN 4)
6-9