Chapter 6 Clustering Switches

Planning a Switch Cluster

Figure 6-5 Discovery Through Routed Ports

Command device

VLAN 9

RP

RP

VLAN 62

VLAN

9

VLAN 62

(management VLAN 62)

VLAN 9

Member device 7

VLAN 4

101324

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.

The cluster command switch in Figure 6-6belongs to VLANs 9 and 16. When new cluster-capable switches join the cluster:

One cluster-capable switch and its access port are assigned to VLAN 9.

The other cluster-capable switch and its access port are assigned to management VLAN 16.

Figure 6-6 Discovery of Newly Installed Switches

Command device

VLAN 9

VLAN 16

Device A

Device B

AP

AP

VLAN 9

VLAN 16

New (out-of-box)

New (out-of-box)

candidate device

candidate device

101325

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

6-10

OL-9775-02

 

 

Page 156
Image 156
Cisco Systems 3750E manual Discovery of Newly Installed Switches, New out-of-box