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Cisco Bug: CSCsz41916 - isis process crash from out of range LSP lifetime

Last Modified

Jan 07, 2017

Products (1)

  • Cisco Carrier Routing System

Known Affected Releases

3.4.2.BASE

Description (partial)

Symptom:
isis process crashes and restarts without impact on traffic forwarding. 

Conditions:
The isis process crashes when the remaining lifetime returned for an LSP is 
greater than the max value of 16-bit unsigned integer, 65535. 

This is considered a rare occurence. 

When NSF is being used, the logs show IS-IS messages as if the adjacencies 
transition and get reset; this is caused since timestamps are not stored 
across an NSF restart. The states on adjacent neighbors show the correct 
state of affairs: that no adjacency resets in fact take place.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
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