Discovery Through Different Management Vlans - Cisco Catalyst 3550 series Software Configuration Manual

Chapter 6 Clustering Switches

Discovery through Different Management VLANs

We recommend using a Catalyst 3550 command switch, a Catalyst 2955 command switch, a
Catalyst 2950 LRE command switch, or a non-LRE Catalyst 2950 command switch running Cisco IOS
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, Catalyst 2955
member switches, Catalyst 2950 LRE member switches, and non-LRE Catalyst 2950 member switches
running Cisco IOS 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 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 non-LRE Catalyst 2950 command switch running Cisco IOS Release 12.1(9)EA1 or later in
Figure 6-5
and 62. The 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 2955, and
Catalyst 3500 XL
78-11194-09
"Discovery through the Same Management VLAN" section on page
and the Catalyst 3550 command switch in
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
Catalyst 2950,
(management
VLAN 16)
switches
Figure 6-6
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 3550 Multilayer Switch Software Configuration Guide
Planning a Switch Cluster
6-8.
have ports assigned to VLANs 9, 16,
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