Figure 33: AP Fail Over When Connectivity to Primary Fails
The backup ExtremeCloud Appliance does not have to detect its link failure with the primary
ExtremeCloud Appliance for the session availability to kick in. If the AP loses five consecutive polls to
the primary ExtremeCloud Appliance either due to the ExtremeCloud Appliance outage or to
connectivity failure, it fails over to the backup ExtremeCloud Appliance fast enough to maintain the user
session.
In session availability mode (
), the APs connect to both the primary and backup ExtremeCloud
Appliance. While the connectivity to the primary ExtremeCloud Appliance is via the active tunnel, the
connectivity to the backup ExtremeCloud Appliance is via the backup tunnel.
Figure 34: Session Availability Mode
Administration
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