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Cisco Bug: CSCum33627 - 'vrrp-eng' process leaks memory during each show run

Last Modified

Feb 15, 2018

Products (1)

  • Cisco Nexus 7000 Series Switches

Known Affected Releases

6.2(6.9)FB(0.4) 7.1(0.1)

Description (partial)

Symptom:
The VRRP process ("vrrp-eng") will leak a small amount of memory each time the 'show running-config' or 'show running-config vrrp' commands are executed. The amount of memory leaked on each occurrence will range from a few hundred bytes to a few kilobytes, and will be approximately proportional to the number of interface present on the device.

The leak is observed under 'libacfg.so' in the output of 'show vrrp internal mem-stats detail' as below:

N5K-A# sh vrrp internal mem-stats detail | grep acfg
   6 [r-xp]/isan/plugin/0/isan/lib/libacfg.s     17     25       2380       2921   <-----
  51 FU_MEM_fu_global_acfg_init_info_t            0      1          0         12

<execute 'show run'>

N5K-A# sh vrrp internal mem-stats detail | grep acfg
   6 [r-xp]/isan/plugin/0/isan/lib/libacfg.s     18     26       2520       3061   <-----
  51 FU_MEM_fu_global_acfg_init_info_t            0      1          0         12

<execute 'show run'>

N5K-A# sh vrrp internal mem-stats detail | grep acfg
   6 [r-xp]/isan/plugin/0/isan/lib/libacfg.s     19     27       2660       3201   <------
  51 FU_MEM_fu_global_acfg_init_info_t            0      1          0         12

Should the VRRP process exceed its memory limit, it will crash and cause a reload of the affected switch or supervisor.

Conditions:
VRRP feature enabled (i.e. 'feature vrrp' is present in the configuration). No VRRP configuration beyond this is required - if the feature is enabled at all the leak will be observed.
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