Working with Network Plans 67Nortel WLAN—Management Software 2300 Series Reference GuideA disassociated session has a grace period of 5 seconds in which the session history can be retrieved andforwarded. After 5 seconds, the session is cleared, and its accounting is stopped. You cannot configure thegrace period.If the client MAC address in a Mobility Domain is not found in 5 seconds, the session is considered new.The 802.1X reauthentication timeout has little impact on roaming. If the timeout lapses, 802.1X processing isperformed on the existing association. Accounting and roaming history are not affected if the reauthenticationis successful, because the client is still associated with the same AP. If reauthentication fails, the session iscleared, and it is not eligible for roaming. If the client associates to the same AP, that is recorded as a newsession.Roaming creates the following effects:• Remote Authentication Dial-In User Service (RADIUS) accounting is treated as a continuation of anexisting session, rather than a new one.• You can view roaming history in the Monitor tab. See “Monitoring the Network” (page 391).• For tracked users, you can view roaming history in the Monitor tab.• The old session is cleared from the WSS, even if the client did not explicitly disassociate from the AP andthe 802.1X reauthentication interval has not lapsed.Traffic Ports Used by WSS SoftwareWhen deploying a Nortel wireless network, you might attach Nortel equipment to subnets that have firewallsor access controls between them. Nortel equipment uses various protocol ports to exchange information. Toensure full operation of your network, make sure the equipment can exchange information on the ports listedin Table 1.Table 1: Traffic Ports Used by WSS SoftwareProtocol Port FunctionIP/TCP (6) 23 Telnet managementIP/TCP (6) 443 SSL management of a WSS via Web ViewPort 443 is also the default port used by WLANManagement Software clients to communicate with aWLAN Management Software server.IP/TCP (6) 8821 Network Domain and Mobility Domain managementThe originating WSS makes a connection from arandom TCP port that is equal to or higher than 4096.The target WSS listens for the traffic on TCP port 8821.IP/TCP (6) 8889 SSL management via WLAN Management Software orGuestPassWLAN Management Software or GuestPass originatesthe SSL connection on TCP port 8889.IP/UDP (17) 53 DNS
