Configuring Session Availability - Extreme Networks Summit WM User Manual

NOTE
In session availability, the maximum number of failover APs that the secondary controller can accommodate is equal
to the maximum number of APs supported by the hardware platform and the license.
When the failed Summit WM Controller recovers, each Summit WM Controller in the pair goes back to
normal mode. They exchange information that includes the latest lists of registered Altitude APs. The
administrator must release the Altitude APs manually on the second Summit WM Controller, so that
they may re-register with their home Summit WM Controller. Foreign APs can now all be released at
once by using the Foreign button on the Access Approval page to select all foreign APs, and then
clicking Released.
To support the availability feature during a failover event, administrators need to do the following:
1 Monitor the critical messages for the failover mode message, in the information log of the secondary
Summit WM Controller (in the Reports and Displays section of the Summit WM Controller).
2 After recovery, on the secondary Summit WM Controller, select the foreign Altitude APs, and then
click Release on the Access Approval page.
After the Altitude APs are released, they establish the active tunnel to their home controller and backup
tunnel to the secondary controller.

Configuring session availability

Configuring session availability is a two-step process:
1 Configuring fast failover
2 Enabling session availability
Summit WM User Guide, Software Version 5.3
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