Cisco Bug: CSCvt63039 - Packet loss may occur even if the traffic rate is very low.
Jun 18, 2020
- Cisco vEdge Router
Known Affected Releases
Symptom: Packet loss may occur when configured qos-map even if the traffic rate is very low compared to calculated bandwidth. This can be seen when qos-map has been applied to the interface and traffics are outgoing through LLQ(Low Latency Queue). Conditions: This can be seen when matched all following conditions. - When traffics are outgoing through LLQ(Low Latency Queue). - When LLQ qos-scheduler burst is configured and the value is under 5700. (default value: 15000) - When the number of traffic is over 9. - When the traffic rate is near 1 Mbps(0.6Mbps to 1.4Mbps). - When configured QoS as following order. 1. policy class-map 2. policy qos-scheduler 3. policy qos-map 4. qos-map to interface
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Bug Details Include
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