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Configuring Switch Clusters
How to Plan for Switch Clustering
Figure 10 Discovery Through Routed Ports
Figure 11 Discovery Through Different Management VLANs with a Layer 3 Cluster Command Switch
Discovery of Newly Installed Switches
To join a cluster, the new, out-of-the-box switch must be connected to the cluster through one of its access ports. An
access port (AP) carries the traffic of and belongs to only one VLAN. By default, the new switch and its access ports are
assigned to VLAN 1.
When the new switch joins a cluster, its default VLAN changes to the VLAN of the immediately upstream neighbor. The
new switch also configures its access port to belong to the VLAN of the immediately upstream neighbor.
101324
RP
RP
VLAN 62
VLAN
9
VLAN 62
VLAN 9
VLAN 4
VLAN 9
Command device
(management
VLAN 62)
Member
device 7
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)