Discovery Of Newly Installed Switches - Cisco Catalyst 2950 Software Manual

Chapter 5 Clustering Switches

Discovery of Newly Installed Switches

A new, out-of-the-box switch is set with the default management VLAN, VLAN 1. By default, all access
ports on the new switch are assigned to management VLAN 1.
To add a new switch to a cluster, it must be connected to the cluster through an access port. When the
new switch joins a cluster, its default management 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.
An access port (AP) carries the traffic of and belongs to the management VLAN.
For example, the command switch in
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•
Figure 5-5
Catalyst 2950
(Management
New (out-of-box)
Catalyst 3550
78-11380-03
A new Catalyst 3550 switch automatically configures the access port to belong to the immediately
upstream VLAN, VLAN 16.
A new Catalyst 2950 switch configures the access port to belong to the upstream VLAN, VLAN 16.
The management VLAN of the Catalyst 2950 switch becomes VLAN 16.
Discovery of Newly Installed Switches
Catalyst 2950
command switch
VLAN 16
switch
AP
VLAN 16)
VLAN 16
Si
switch
Figure 5-5 belongs to management VLAN 16.
VLAN 16
Catalyst 3500 XL
switch
(Management
AP
VLAN 16)
VLAN 16
New (out-of-box)
Catalyst 2950
switch
Catalyst 2950 Desktop Switch Software Configuration Guide
Planning a Switch Cluster
5-9