Discovery Of Newly Installed Switches - Cisco WS-C3550-12G Software Configuration Manual

Chapter 5 Clustering Switches

Discovery of Newly Installed Switches

A new, out-of-the-box switch is set with the default VLAN, VLAN 1. By default, all access ports on the
new switch are assigned to 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 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 only one VLAN. For more information about
access ports, see the
For example, the command switch in
•
•
Figure 5-7
Catalyst 2950
(Management
New (out-of-box)
Catalyst 3550
78-11194-03
"Access Ports" section on page
A new Catalyst 3550 switch automatically configures the access port to belong to the immediately
upstream VLAN, VLAN 9.
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 3550
command switch
Si
VLAN 9
switch
AP
VLAN 9)
VLAN 9
Si
switch
8-2.
Figure 5-7 belongs to VLAN 9 and VLAN 16.
VLAN 16
Catalyst 3500 XL
switch
(Management
AP
VLAN 16)
VLAN 16
New (out-of-box)
Catalyst 2950
switch
Catalyst 3550 Multilayer Switch Software Configuration Guide
Planning a Switch Cluster
5-11