Concept Guide

1513| show ha oversubscription statistics Dell Networking W-Series ArubaOS 6.5.x| Reference Guide
AP Failover
If a standby controller reaches its AP oversubscription capacity or exceeds its maximum BSSID limit, the
standby controller drops any subsequent standby AP connections. A dropped AP attempts to reconnect to the
standby controller, but after it exceeds the maximum number of request retries, the AP informs the active
controller that it is unable to connect to the standby controller. The active controller then prompts the APto
create a standby tunnel to another standby controller, if one is configured.
If an active controller fails, the APs on the active controller fail over to the standby controller. Once the standby
controller has reached its capacity for active APs,it terminates tunnels to any standby APs that controller can
no longer serve. When these APs detect that there is no longer a heartbeat between the AP and the standby
controller, they notify their active controller that they can no longer connect to the standby. The active
controller then promptsthe APs to establish standby tunnels to another standby controller, if one is
configured.
Examples
The following command displays oversubscription statistics for APs and tunnels
(host) #show ha oversubscription statistics
Platform oversubscription factor : 4
APs Limits
------------------
APs Number
---- ------
Platform Limit 512
Current Active 2
Current Standby 694
Active remaining 0
Standby remaining 1
Maximum allowed Standby 697
BSS Limits
--------------------
Tunnels Limits
------- ------
Maximum BSS tunnels 16384
Average BSS/AP 23
BSS tunnels in use 16360
BSS tunnels available 24
The output of this command includes the following parameters:
Parameter Description
Platform limit
Maximum number of APs supported by the controller platform.
Current Active
Number of active APs currently associated to the controller.
Current Standby
Number of APs that are currently using the controller as a standby controller.
Active Remaining
Number of APs that can connect to this controller in Active mode.
Standby Remaining
Number of APs that can connect to this controller in Standby mode.
Maximum allowed
Standby
Maximum number of Standby APs supported by the controller.