User's Manual

6-9
Catalyst 3750 Switch Software Configuration Guide
OL-8550-09
Chapter 6 Clustering Switches
Planning a Switch Cluster
Figure 6-4 Discovery Through Different Management VLANs with a Layer 3 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 page 12-4.
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)