Cisco Bug: CSCvv16454 - Traffic failure due to MPLS ECMP load-balancing in one of the labelled path
Aug 31, 2020
- Cisco ASR 920 Series Aggregation Services Router
Known Affected Releases
Symptom: In a particular case, customer observed an outage for certain flows when he had two ECMP paths from node A to node B. One of the paths was labeled(A connected to B via another node), and the other unlabeled(direct connection between A and B, resulting in PHP). Traffic flows that were being hashed to the labeled path was being dropped since the ASR-920 would forward it with an incorrect label in the data plane, even though the control plane showed the correct labels programmed. Conditions: Whenever there is ECMP available and any of the paths are labeled.
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Bug Details Include
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