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Cisco Bug: CSCup65579 - UC 3:1 congestion, high priority dropped, and low fwded

Last Modified

Aug 07, 2018

Products (1)

  • Cisco Network Convergence System 6000 Series Routers

Known Affected Releases

5.2.1.BASE

Description (partial)

Symptom:In a 3:1 oversubscription, high priority dropped, and low forwarded
Conditions:With 3:1 oversubscribed Amba destination, with a mix of high and low priority unicast traffic, its seen that high priority traffic is dropped while allowing low priority traffic to flow through. The expected behavior is to forward all HP upto max bandwidth, and forward LP only if not total HP < egress line-rate. 

Problem is seen for various pkt sizes tested: 247B, 248B, 256B, 1500B etc.
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