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Cisco Bug: CSCvv10315 - observing ~48% traffic loss with IMIX traffic in r71x and r72x on 5500

Last Modified

Sep 03, 2020

Products (1)

  • Cisco ASR 9000 Series Aggregation Services Routers

Known Affected Releases

7.2.1.BASE 7.3.1.BASE

Description (partial)

Release-note

Symptom:
Traffic drop can be observed on line card listed below for jumbo packet size like 7K or more. Traffic drop issue is not seen on non potenza LC variant.
This is seen in r71x, r72x.

Card variant : 
NC55-36X100G
NC55-36X100G-S
NC55-36X100G-A-SE
NC55-24H12F-SE
NC55-24X100G-SE
NC55-6x200-DWDM-S
NC55-18H18F

Conditions:
If the interface is not having egress QoS policy, then traffic drop for jumbo frame size during congestion may be observed on the above listed line card.
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