Events And Actions In Availability - Extreme Networks Summit WM User Manual

Availability and session availability
NOTE
The availability feature provides Altitude APs with a list of interfaces. The Altitude AP should attempt to connect
automatically to these interfaces when the connection with an active controller link is lost. The provided list
identifies the local active interfaces (enabled on the primary and backup controllers) for the active controller as well
as the active interfaces for the backup controller. The list is sorted by top-down priority. If the active link is lost (poll
failure), the Altitude AP automatically scans (pings) all addresses in its availability interface list. The Altitude AP
will then connect to the highest priority interface that responds to its probe.

Events and actions in availability

If one of the Summit WM Controllers in a pair fails, the connection between the two Summit WM
Controllers is lost. This triggers a failover condition following which a critical message is displayed in
the information log of the secondary Summit WM Controller.
After the Altitude AP on the failed Summit WM Controller loses its connection, it will try to connect to
all enabled interfaces on both controllers without rebooting. If the Altitude AP is successful, it will
begin the discovery process. If the Altitude AP is not successful in connecting to the Summit WM
Controller after five minutes of attempting, the Altitude AP will reboot.
If the Altitude AP is assigned to different WM-ADs on the two controllers, it will reboot. Because of the
pairing of the two Summit WM Controllers, the Altitude AP will then register with the other Summit
WM Controller.
All user sessions using the failover Altitude AP will terminate unless the Maintain client sessions in
event of poll failure option is enabled on the AP Properties tab or AP Default Settings page.
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Summit WM User Guide, Software Version 5.3