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Cisco Bug: CSCum03685 - memory leak symptoms in session manager accounting

Last Modified

Nov 27, 2020

Products (1)

  • Cisco 2600 Series Multiservice Platforms

Known Affected Releases

15.1(2.0) n/a

Description (partial)

Symptom:
In a dual-supervisor switch configured for 802.1x port access control, a memory leak is observed on the standby supervisor. The memory will be consumed under "cpf_msg_rcvq_pro[cess]": the "Holding" column for this process will increase by several megabytes per day. When sufficient memory has been leaked, this might result in unexpected behavior such as high CPU utilization, error messages, and diagnostic failures on the standby supervisor.

The following example showing the leak is taken from a Catalyst 6500 switch.
<pre>
Switch#remote command standby-rp show process memory sorted

Processor Pool Total: 1517530148 Used: 1494365988 Free:   23164160
      I/O Pool Total:  268435456 Used:  132587424 Free:  135848032

 PID TTY  Allocated      Freed    Holding    Getbufs    Retbufs Process
 125   0 1167695192 1039772016 1201047936  148257640  191775440 cpf_msg_rcvq_pro  <-- leak observed in "Holding" here
   0   0  284954432      24064  267416372          0          0 *Init*          
 198   0   90010540      39140   86989068          0          0 PF_Init Process 
 655   0 1749625216  951531432   23248612    1641192 1460562256 DiagCard8/-1    
 379   0   15009880       4168   14927876          0          0 Lif main process
</pre>

Conditions:
This is observed on Catalyst 4500 and Catalyst 6500 switches, with dual supervisors, which have 802.1x port access control configured.
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