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Cisco Bug: CSCvt56969 - High CPU by EZman on SIP MIP100 triggers a crash

Last Modified

May 14, 2020

Products (1)

  • Cisco ASR 1000 Series Aggregation Services Routers

Known Affected Releases

16.12.3

Description (partial)

Symptom:
There is high CPU utilization in MIP100 under process ezman in one of the slots, run 'show platform software process slot <number> monitor':

<pre>
Router# show platform software process slot 1 monitor
top - 18:00:35 up 10:07,  0 users,  load average: 1.17, 1.18, 1.14
Tasks: 106 total,   2 running, 104 sleeping,   0 stopped,   0 zombie
%Cpu(s): 32.3 us, 56.9 sy,  0.0 ni, 10.7 id,  0.0 wa,  0.0 hi,  0.1 si,  0.0 st
KiB Mem :  2002404 total,  1336080 free,   276276 used,   390048 buff/cache
KiB Swap:        0 total,        0 free,        0 used.  1409024 avail Mem

  PID USER      PR  NI    VIRT    RES    SHR S %CPU %MEM     TIME+ COMMAND
 3069 root      20   0  180168 111820  34240 R 75.0  5.6 502:49.58 ezman                           <<<<
22787 root      20   0    4048   2360   2064 R 10.0  0.1   0:00.05 top
</pre>

To get an overview of the card CPU usage run 'show platform resources':

<pre>
------------------ show platform resources ------------------

**State Acronym: H - Healthy, W - Warning, C - Critical                                             
Resource                 Usage                 Max             Warning         Critical        State
----------------------------------------------------------------------------------------------------
...
SIP1                                                                                           W    
 Control Processor       89.00%                100%            80%             90%             W      <<< High CPU
  DRAM                   639MB(32%)            1955MB          88%             93%             H
</pre>

Conditions:
High number of VLANs/subinterfaces configured under the interfaces of MIP100.
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