Cisco Bug: CSCup01145 - TE traffic outage about 4 minutes across switchover
Jun 08, 2018
- Cisco ASR 9000 Series Aggregation Services Routers
Known Affected Releases
Symptom: When a primary RP (or DSC in the case of nV cluster) switchover occurs and interface down events are followed at the same time, a TE tunnel keeps the dead interface as the outgoing interface about 4 minutes. This causes VPN (ether L3 of L3) traffic outage which has been being carried over the TE tunnel destined to the peer PE, whose route in the RIB is pointed to the TE tunnel as the outgoing interface by autoroute announce. LDP or BGP session with the peer on the TE tunnel will be brought down with the default hold timer values. Routing sessions cannot be established until the TE is recalculated and re-established again (through a new valid path). The outage is reduced from 4 minutes to about 30 seconds in 5.2.0 or later. Conditions: RP (or DSC in the nV cluster case) fail-over occurs, and interface down events occur at the same time.
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Bug Details Include
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