Discovery Of Newly Installed Switches - Cisco Catalyst 2960 Software Configuration Manual

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Planning a Switch Cluster

If the switch cluster has a Catalyst 3750 or 2960-S switch or has a switch stack, that switch or switch

stack must be the cluster command switch.

The cluster command switch and standby command switch in

Catalyst 2960, Catalyst 2970, Catalyst 2975, Catalyst 3550, Catalyst 3560, or Catalyst 3750 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:

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 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.

Catalyst 2960 and 2960-S Switches Software Configuration Guide, Release 15.0(1)SE

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

Discovery Through Different Management VLANs with a Layer 3 Cluster Command

Standby command

VLAN trunk 4, 62

Clustering Switches

(assuming they are

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