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Cisco Bug: CSCuq64102 - RSCN or ZONE service crash during zoning configuration change

Last Modified

Sep 09, 2019

Products (1)

  • Cisco MDS 9000 Series Multilayer Switches

Known Affected Releases

6.2(1)

Description (partial)

Symptom:
The RSCN or ZONE service crashes with the following syslog message:

  %SYSMGR-2-SERVICE_CRASHED: Service "rscn" (PID 5405) hasn't caught signal 11 (core will be saved).
or
  %SYSMGR-2-SERVICE_CRASHED: Service "zone" (PID 5430) hasn't caught signal 6 (core will be saved)

MDS 9700 can incur a switchover, however in most cases, the crash occurs again before the standby is available and the dual supervisor switch will reload.

For Example:
<pre>
`show system reset-reason`
----- reset reason for Supervisor-module 5 (from Supervisor in slot 5) ---
1) At 161169 usecs after Thu Dec dd hh:mm:ss 2014
    Reason: Reset triggered due to HA policy of Reset
    Service: rscn hap reset
...
----- reset reason for Supervisor-module 6 (from Supervisor in slot 6) ---
1) At 422003 usecs after Thu Dec dd hh:mm:ss 2014
    Reason: Reset triggered due to HA policy of Reset
    Service: rscn hap reset
</pre>

Conditions:
This issue occurs only when 'port' format RSCNs are configured and an RSCN is sent on the relevant VSAN. RSCNs are sent, for example, after activating zoneset changes or a link changing state. Further, only the following platforms are affected:

  MDS 9710
  MDS 9706
  Nexus 7000
  Nexus 7710

This issue does not occur when RSCNs are sent with 'fabric' format.
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