Cisco Bug: CSCul19094 - Non-ECN capable behavior enhancement
Feb 11, 2018
- Cisco Nexus 3000 Series Switches
- Cisco Nexus 3064 Switch
- Cisco Nexus 3016 Switch
- Cisco Nexus 3064-T Switch
- Cisco Nexus 3048 Switch
- Cisco Nexus 3132Q Switch
Known Affected Releases
Problem: When ECN and non-ECN capable traffic is present on the same egress queue, non-ECN-capable traffic gets dropped on exceeding the MAX threshold configured. Requirement: Under low congestion / queue build scenario, allow low rate non-ECN capable traffic to go through without drops, even if the ECN thresholds are exceeded. To keep the solution generic for any traffic stream with ECN bits set, avoid a stream type based classification. Symptom: ECT = 0 packets are dropped based on WRED thresholds applied on ECN enabled traffic classes. Conditions: Packets having ECT=0 and classfied to traffic classes where ECN is enabled.
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Bug Details Include
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