Configuring and managing Mobility Domain roaming 227
Nortel WLAN—Security Switch 2300 Series Configuration Guide

Displaying roaming VLANs and their affinities

The command show roaming vlan displays all VLANs in the Mobility Domain, the WSSs servicing the VLANs, and
their tunnel affinity values configured on each switch for the VLANs.
The member WSS that offers the requested VLAN reports the affinity number. If multiple WSSs have native attach-
ments to the VLAN, the affinity values they advertise are a way to attract tunneled traffic to a particular WSS for that
VLAN. A higher value represents preferred connection to the VLAN. (For more information, see “Changing tunneling
affinity” on page 126.)
To display roaming VLANs, type the following command:
WSS# show roaming vlan
VLAN WSS Affinity
---------------- -------------- - --------
vlan-eng 192.168.12.7 5
vlan-fin 192.168.15.5 5
vlan-pm 192.168.15.5 5
vlan-wep 192.168.12.7 5
vlan-wep 192.168.15.5 5
(For more information about this command and the fields in the output, see the Nortel WLAN Security Switch 2300
Series Command Line Reference.)

Displaying tunnel information

The command show tunnel displays the tunnels that the WSS is hosting to distribute to a locally attached VLAN. To
display tunnel information, type the following command:
WSS# show tunnel
(For more information about this command and the fields in the output, see the Nortel WLAN Security Switch 2300
Series Command Line Reference.)

Understanding the sessions of roaming users

When a wireless client successfully roams from one AP to another, its sessions are affected in the following ways:
The WSS treats this client session as a roaming session and not a new session.
RADIUS accounting is handled as a continuation of an existing session, rather than a new one.
The session with the roamed-from AP is cleared from the WSS, even if the client does not explicitly disassociate
from the AP and the IEEE 802.1X reauthentication period has not expired.
V L A N L o c a l A d d r e s s R e m o t e A d d r e s s S t a t e P o r t LV I D RV I D
vlan-eng 192.168.12.7 192.168.15.5 UP 1024 130 4103
vlan-eng 192.168.12.7 192.168.14.6 DORMANT 1026 130 4097
vlan-pm 192.168.12.7 192.168.15.5 UP 1024 4096 160