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Cisco Bug: CSCus45572 - High CPU FFM process

Last Modified

Jan 28, 2017

Products (1)

  • Cisco 5700 Series Wireless LAN Controllers

Known Affected Releases


Description (partial)

With about 300 access points or more and 4000 users.
CPU constantly shows as follows,

WWP-5760#show proc cpu sorted detailed | e 0.00
Core 0: CPU utilization for five seconds: 85%; one minute: 43%; five minutes: 36%
Core 1: CPU utilization for five seconds: 87%; one minute: 60%; five minutes: 52%
Core 2: CPU utilization for five seconds: 62%; one minute: 46%; five minutes: 45%
Core 3: CPU utilization for five seconds: 92%; one minute: 55%; five minutes: 58%

FFM process will be the top CPU consumer.

WLAN in use is open, the only security is an ACL configured to restrict access to internal network resources.
Same ACL, same configuration and same users work  fine on a 5508 WLC.
The issue has seen on 3.3.3SE up to 3.3.5SE as well as 3.6
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