Best practice: Aggregated Probe Response Optimizations

WiFisionAggregated Probe Response Optimizations

For large high density deployments, it is advisable to modify the default aggregate probe interval sent by access points. By default, the APs will update every 500ms about the probes sent by clients, this information is used by load balancing, band select, location and 802.11k features.

If there is a large number of clients and access points, it is advisable to modify the update interval, to prevent control plane performance issues in the WLC(!)

To change:

config advanced probe limit 50 64000

That would set it to 50 aggregated probe responses every 64 seconds.

Restriction:This should be used in most scenarios with very large count of access points and clients.

(wc-wifision) >show advanced probe

Probe request filtering…………………….. Enabled
Probes fwd to controller per client per radio…. 50
Probe request rate-limiting interval…………. 64000 msec
Aggregate Probe request interval…………….. 200 msec
Increased backoff parameters for probe respon…. Disabled

source: Cisco Wireless LAN Controller (WLC) Configuration Best Practices

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