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Cisco Bug: CSCul98869 - ISIS purged LSP being ignored with failed authentication

Last Modified

Mar 10, 2018

Products (1)

  • Cisco IOS

Known Affected Releases

12.2(33)SRD

Description (partial) 

RNE Enclosure

Symptom:
If two routers are assigned duplicate system IDs, after the duplicate system ID is resolved (e.g., by changing the system ID of one router) stale LSPs from the duplicate router may persist in the network until they age out.

Conditions:
MD5 authentication MUST be in use and the router with duplicate system ID must be generating one or more LSPs with LSP numbers higher than those generated by the router whose systemID remains unchanged.
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