Cisco Bug: CSCsy84853 - CRS-1 ospf area range pointing to null0
May 16, 2018
- Cisco Carrier Routing System
Known Affected Releases
Symptom: IOS-XR configured for OSPF ABR with area range prefer the Null0 entry Conditions: Configuring under ospf: range x.x.x.x 255.255.255.255 advertise I have: Routing entry for x.x.x.x/32 Known via "ospf 1", distance 110, metric 0, type intra area Installed Apr 1 00:40:11.898 for 00:20:12 Routing Descriptor Blocks directly connected, via Null0 <---here is the problem, we leave the Null0 and so black holing traffic Route metric is 0 y.y.y.y, from x.x.x.x, via TenGigE0/15/5/0.122 <--this is not chosen Route metric is 5 No advertising protos.
Bug details contain sensitive information and therefore require a Cisco.com account to be viewed.
Bug Details Include
- Full Description (including symptoms, conditions and workarounds)
- Known Fixed Releases
- Related Community Discussions
- Number of Related Support Cases