Specifications

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Understanding the Sessions of Roaming Users

RoamAbout Mobility System Software Configuration Guide 7-9

Effects of Timers on Roaming

Anunsuccessfulroamingattemptmightbecausedbythefollowing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AP.Ifreauthenticationfails,MSSclearsthesessionsoitisnoteligibleforroaming.

IftheclientassociateswiththesameAP,thesessionisrecordedasanew

session.

(Tochangethereauthenticationtimeout,see“Settingthe802.1XReauthenticationPeriod”on

page 19‐6.)

Monitoring Roaming Sessions

Tomonitorthestateofroamingclients,usetheshow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RoamAboutSwitch.

Example

TheoutputshowsthattheclientSHUTTLE\2\exmplroamedfromtheAPconnectedtoport 3to

theAPconnectedtoport 6onthesameRoamAboutSwit ch,andthenroamedbacktotheAP

connectedtoport 3.

RBT-8100> show 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: RAS 10.3.8.103, AP/radio 3/1, AP 00:0b:0e:ff:00:3a, as of 00:00:24 ago

from: RAS 10.3.8.103, AP/radio 6/1, AP 00:0b:0e:00:05:d7, as of 00:01:07 ago

from: RAS 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RoamAbout

MobilitySystemSoftwareCommandLineInterfaceReferenceGuide.)