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How to Maintain Wireless Services upon an IdentiFi Controller Loss

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TitleHow to Maintain Wireless Services upon an IdentiFi Controller Loss
Objective
  • How to Maintain Wireless Services upon an IdentiFi Controller Loss
  • Keeping active sessions going if the access point can no longer connect to the controller. 
Environment
  • IdentiFi
  • All Firmware 
Procedure

In order to maintain wireless services in the event the IdentiFi appliance goes offline, it is important to understand the ability to keep the Access Points' clients online with no reboot can only be achieved with a "Bridge at Access Point" topology. The "Bridge at Controller" and "Routed" topologies do not support this ability.

Activation of the "Bridge at Access Point" function must be enabled per Access Point. Use the IdentiFi Wireless Assistant (Web GUI), found under Wireless APs, select an AP or use multi-edit, then select the "Advanced" tab in the AP Properties Window, and enable these features:

  • Maintain client sessions in event of poll failure
  • Restart service in the absence of controller

Supported Configuration Matrix:
Note: In this matrix, 'B@AP' means "Bridge at Access Point", and 'B@EWC' means "Bridge at Extreme Controller".

 EncryptionVNS - NonAuth Topology_TrafficVNS - Auth Topology_TrafficThe Access Point accepts new client associations.Associated clients still continue to pass traffic.Description
 1WPA-PSK, Static WEPB@APB@APYesYesThe Controller link going down has no impact on the clients' ability to roam, associate, or pass traffic.
 2WPA-PSK, Static WEPB@EWCB@APNoYesThe Controller link going down allows already connected clients to continue to pass traffic; but any new clients coming on during the outage will fail and any clients that roam from AP to AP will fail.
 3MAC-Auth, 802.1x, Web PortalB@APB@APNoYesThe Controller link going down allows already connected & authenticated clients to continue to pass traffic; but any new clients coming on during the outage will fail and any clients that roam from AP to AP will fail.
 4MAC-Auth, 802.1x, Web PortalB@HWCB@APNoYesThe Controller link going down allows already connected & authenticated clients to continue to pass traffic; but any new clients coming on during the outage will fail and any clients that roam from AP to AP will fail.
 5Any ServiceB@EWC/RoutedB@EWC/RoutedNoNoThe Controller link going down provides no services at all; the Access Point reboots.

*In Sites Mode as long as the local RADIUS server is still present then clients will still authenticate locally.

Additional notes

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