162CHAPTER 8: CONFIGURING AND MANAGING MOBILITY DOMAIN ROAMING

Effects of Timers on An unsuccessful roaming attempt might be caused by the following Roaming timers. You cannot configure either timer.

„Grace period — A disassociated session has a grace period of

5 seconds during which MSS can retrieve and forward the session history. After 5 seconds, MSS clears the session, and its accounting is stopped.

„MAC address search — If MSS cannot find the client’s MAC address in a Mobility Domain within 5 seconds, it treats the session as a new session rather than a roaming session.

In contrast, the 802.1X reauthentication timeout period has little effect on roaming. If the timeout expires, MSS performs 802.1X processing on the existing association. Accounting and roaming history are unaffected when reauthentication is successful, because the client is still associated with the same MAP. If reauthentication fails, MSS clears the session so it is not eligible for roaming.

If the client associates with the same MAP, the session is recorded as a new session. (To change the reauthentication timeout, see “Setting the 802.1X Reauthentication Period” on page 537.)

Monitoring Roaming To monitor the state of roaming clients, use the display sessions Sessions network verbose command. For example, the following command

displays information about the sessions of a wireless client who roamed between the ports on a WX switch.

The output shows that the client SHUTTLE\2\exmpl roamed from the MAP connected to port 3 to the MAP connected to port 6 on the same WX, and then roamed back to the MAP connected to port 3.

WX1200> display sessions network verbose

User

Sess

IP or MAC

VLAN

Port/

Name

ID

Address

Name

Radio

SHUTTLE2\exmpl------------------------------

----6*

-----------------

---------------

-----

10.3.8.55

default

3/1

Client MAC: 00:06:25:13:08:33

GID:

SESS-4-000404-98441-c807c14b

 

State: ACTIVE

(prev

AUTHORIZED)

 

 

now on: WX

10.3.8.103, AP/radio

3/1, AP 00:0b:0e:ff:00:3a, as of 00:00:24 ago

from: WX

10.3.8.103, AP/radio

6/1,

AP

00:0b:0e:00:05:d7,

as

of

00:01:07

ago

from: WX

10.3.8.103, AP/radio

3/1,

AP

00:0b:0e:ff:00:3a,

as

of

00:01:53

ago

1 sessions

total

 

 

 

 

 

 

 

(For more information about this command and the fields in the output, see the Wireless LAN Switch and Controller Command Reference.)

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3Com WX1200 3CRWX120695A, WXR100 3CRWXR10095A, WX4400 3CRWX440095A manual WX1200 display sessions network verbose, Vlan
Page 161 Page 163

WX1200 3CRWX120695A, WX4400 3CRWX440095A, WXR100 3CRWXR10095A, WX2200 3CRWX220095A specifications

The 3Com WX2200 (3CRWX220095A), WX4400 (3CRWX440095A), WX1200 (3CRWX120695A), and WXR100 (3CRWXR10095A) are part of a robust suite of wireless networking solutions offered by 3Com, designed to meet the needs of modern enterprise environments. These devices provide reliable connectivity, flexibility, and scalability, making them ideal for businesses of all sizes.

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