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Cisco Bug: CSCul70008 - Improve IPFRR neighbor backlink check

Last Modified

Feb 13, 2018

Products (25)

  • Cisco IOS
  • Cisco ASR 901-6CZ-FS-D Router
  • Cisco ASR 901-6CZ-F-D Router
  • Cisco ASR 901S-4SG-F-D Router
  • Cisco ASR 901-4C-FT-D Router
  • Cisco ME 3600X-24TS-M Switch
  • Cisco ASR 901S-2SG-F-AH Router
  • Cisco ASR 901S-2SG-F-D Router
  • Cisco ASR 901-6CZ-F-A Router
  • Cisco ASR 901-6CZ-FT-A Router
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Known Affected Releases

15.4(3)S

Description (partial)

Symptom:
OSPF neighbor which is listed as FULL on local router but lost its FULL status in its own Router LSA will not be used during SPF for primary paths because of backlink check. But this neighbor might be considered for the repair paths during IPFRR SPF.

Conditions:
OSPF neighbor which used to be FULL just lost its adjacency but Dead timer on the local router hasn't expired yet.
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