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Cisco Bug: CSCvi87166 - Nexus 3500 crashes with "spm hap reset" due to memory leak in libspm.so or only SPM process crashes.

Last Modified

Sep 27, 2018

Products (1)

  • Cisco Nexus 9000 Series Switches

Known Affected Releases

6.0(2)A8(4a)

Description (partial)

Symptom:
N3500 reloads with "spm hap reset" or only SPM process crashes. A core file may or may not be generated.

Conditions:
Following error might be seen before the crash:

<pre>
%AFM-2-AFM_TCAM_UTIL_ABOVE_THRESHOLD: nat tcam utilization has gone above the threshold of 90% on ASIC id 0
</pre>
which means NAT has to be configured and heavily utilized.

Also, the following library in SPM is constantly increasing its Current allocated memory, for example:
<pre>
TYPE NAME                                           ALLOCS                 BYTES
                                               CURR    MAX       CURR        MAX
...
116 [r-xp]/isan/plugin/1/isan/lib/libspm.so 2913705 2916326   46619280   46771792
...
116 [r-xp]/isan/plugin/1/isan/lib/libspm.so 7628055 7630322  122048880  122196488
</pre>
this can be checked with "show system internal spm mem-stats detail".
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