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Cisco Bug: CSCuq90696 - OSPFv3 routes are removed and reinstalled when connected link goes down

Last Modified

Sep 20, 2018

Products (1)

  • Cisco Carrier Routing System

Known Affected Releases

5.2.2.BASE

Description (partial)

Symptom:
OSPFv3 network can have short (1-5 sec) traffic drop after directly connected interface goes down

Conditions:
The problem becomes more severe when fast-reroute is enabled in ospfv3, because all prefixes are deleted/readded when the link flaps, which causes an outage despite the fast-reroute (when the route is deleted, both primary and backup paths are deleted)
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