2811 eating all IO memmory

Unanswered Question
Jul 13th, 2008
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Hi,


We have an 2811 which uses crypto and nat.


This router consumes all of its IO memory over time and starts generating alloc failures.


IF we compare the memory usage of the io memory to a healty router with a comparable config it had several 65Kb memory blocks assigned to Normal.


it is running 12.4 3g.


Anyone an idea ?


TIA,


Tom

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a.alekseev Sun, 07/13/2008 - 22:11
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You have a memory leak.


You need upgrade your IOS.

Tsasbrink Mon, 07/14/2008 - 02:53
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It sure looks like it, but my question is how do I confirm that it is an known bug or not.


I will not be able te know if newer ios code will fix it or not if i can not indentify the bug.





a.alekseev Mon, 07/14/2008 - 03:10
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looks like it's yours

CSCsb60583 Bug Details


NetGX : Memory Leak in IOmem - Normal buffer

Symptom:

When running a 2800 at a high CPU utilization, I/O Memory will begin to

decrease until all memory is exhausted. At that point the router begins

reporting "Pool Manager" tracebacks.


Conditions:


This symptom is observed on a Cisco 2811 or Cisco 2821 that

uses the onboard Virtual Private Network (VPN) crypto engine.

The symptom is prominantly observed when crypto is configured

over serial interfaces.


Workaround:


There is no workaround. The router must be reloaded to recover.


Tsasbrink Tue, 07/15/2008 - 22:28
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The problem seems to be solved by upgrading to 12.4 19b software.


The profile however does not meet our situation entirely because we are not running on high cpu load. in normal behaviour the highest peeks with shoe proc cpu his are registered te be 5%.


adns Tue, 07/22/2008 - 09:50
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We tested with 12.4.19b and still saw the memory leak. Cisco support desk recommends upgrading from our old 12.4.10 to 19b but it looks like 19b doesn't pan out. Has anyone looked at 12.4.21 to resolve this memory leak?

Tsasbrink Tue, 07/22/2008 - 21:57
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We have not used this version as i believe it was not available at the time we were investigating this.


But anyway the bug behaviour does not seem to be predictable as we still have allmost similar configured routers which do not have the problems with 12.4.3g.


Anyway the 12.4.19b does not seem to give us any trouble.


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