Discovery Through Routed Ports - Cisco Catalyst 3750-X Software Configuration Manual

Planning a Switch Cluster
If the switch cluster has a Catalyst 3750-E or Catalyst 3750-X switch or switch stack, that switch or
Note
switch stack must be the cluster command switch.
The cluster command switch and standby command switch in
Catalyst 2960 Catalyst 2970, Catalyst 3550, Catalyst 3560, Catalyst 3560-E, Catalyst 3750,
Catalyst 3750-E, Catalyst 3560-X, or Catalyst 3750-X cluster command 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 6-4
(management

Discovery Through Routed Ports

If the cluster command switch has a routed port (RP) configured, it discovers only candidate and cluster
member switches in the same VLAN as the routed port. For more information about routed ports, see the
"Routed Ports" section on page
The Layer 3 cluster command switch in
the switch in VLAN 4. If the routed port path between the cluster command switch and cluster member
switch 7 is lost, connectivity with cluster member switch 7 is maintained because of the redundant path
through VLAN 9.
Catalyst 3750-X and 3560-X Switch Software Configuration Guide
6-8
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 with a Layer 3 Cluster Command
Switch
Command
device
VLAN 16
Device 3
VLAN 16)
VLAN 16
Device 4
(management
VLAN 16)
Standby command
device
VLAN 9
VLAN 62
Device 5
(management
VLAN 62)
VLAN trunk 4, 62
Device 7
(management
VLAN 4)
VLAN 62
Device 9
(management
VLAN 62)
13-4.
Figure 6-5 can discover the switches in VLANs 9 and 62 but not
Chapter 6 Clustering Switches
Figure 6-4 (assuming they are
VLAN 9
Device 6
(management
VLAN 9)
VLAN 9
Device 8
(management
VLAN 9)
VLAN 4
Device 10
(management
VLAN 4)
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