6-9

Catalyst 3750 SwitchSoftware Configuration Guide
OL-8550-09
Chapter6 Clustering Switches
Planning a Switch Cluster
Figure6-4 Discovery Through Different Management VLANs with a Layer3 Cluster Command
Switch
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 page12-4.

The Layer 3 cluster command switch in Figure 6-5 can discover the switches in VLANs 9 and 62 but not

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.

101323
VLAN 62
VLAN trunk 4, 62
VLAN 62
VLAN 16
VLAN 9
VLAN 16 VLAN 9
Standby command
device
Command
device
VLAN 9
Device 7
(management
VLAN 4)
Device 9
(management
VLAN 62)
VLAN 4
Device 3
(management
VLAN 16)
Device 4
(management
VLAN 16)
Device 10
(management
VLAN 4)
Device 8
(management
VLAN 9)
Device 6
(management
VLAN 9)
Device 5
(management
VLAN 62)