I understand that by default AP load balancing isn't enabled.
My cluster is defined thus:
(MD2) #show lc-cluster group-membership
Cluster Enabled, Profile Name = "MD-Cluster"
Redundancy Mode On
Active Client Rebalance Threshold = 50%
Standby Client Rebalance Threshold = 30%
Unbalance Threshold = 5%
AP Load Balancing: Enabled
Active AP Rebalance Threshold = 50%
Active AP Unbalance Threshold = 5%
Active AP Rebalance AP Count = 10
Active AP Rebalance Timer = 5 minutes
Cluster Info Table
------------------
Type IPv4 Address Priority Connection-Type STATUS
---- --------------- -------- --------------- ------
peer 10.0.0.1 128 L2-Connected CONNECTED (Member, last HBT_RSP 100ms ago, RTD = 0.267 ms)
self 10.0.0.2 128 N/A CONNECTED (Leader)
I see that clients do load balance:
(MD2) #show lc-cluster load distribution client
Cluster Load Distribution for Clients
-------------------------------------
Type IPv4 Address Active Clients Standby Clients
---- --------------- -------------- ---------------
peer 10.0.0.1 65 848
self 10.0.0.2 852 65
Total: Active Clients 917 Standby Clients 913
But at this point, I've deliberately moved some AP's to the second controller because they were not auto balancing...
(MD2) #show lc-cluster load distribution ap
Cluster Load Distribution for APs
---------------------------------
Type IPv4 Address Active APs Standby APs
---- --------------- -------------- ---------------
peer 10.0.0.1 474 769
self 10.0.0.2 769 474
Total: Active APs 1243 Standby APs 1243
I've seen some examples where auto balancing was happening with less than 100 AP's... but perhaps I shouldn't expect that with a pair of 7240's running as the MD's for this environment.