Cisco Bug: CSCvv84876 - non-working isis routes with missing/unknown outgoing interface
Oct 14, 2020
- Cisco ASR 9000 Series Aggregation Services Routers
Known Affected Releases
Symptom: After multiple simultaneous changes in the network (link up/down flaps), ISIS route in the globa routing table (RIB) has nexthop 0.0.0.0 and Unknown outgoing interface. Example: i L2 10.135.51.248/30 [115/1150] via 0.0.0.0, 00:13:57, Unknown [115/1150] via 10.134.2.245, 00:13:57, Bundle-Ether5043 (!) [115/1150] via 10.135.30.5, 00:13:57, Bundle-Ether11115 Conditions: Problem may happen only for prefixes originated by multiple ISIS nodes, when microloop avoidance segment-routing is configured.
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Bug Details Include
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