Cisco Bug: CSCte18140 - Dev:enhancement of queuing of control packets at egress generated by CPU
Feb 04, 2017
- Cisco Catalyst 4000 Series Switches
Known Affected Releases
Symptom: Under conditions of traffic congestion and over subscription, Cpu generated control packets get dropped and cause undesired behavior in control protocols. E.g. In case of REP protocol the following messages will be seen *Nov 4 23:01:37.871: %REP-4-LINKSTATUS: GigabitEthernet2/6 (segment 1) is non-operational due to neighbor not responding Switch# *Nov 4 23:01:48.583: %REP-4-LINKSTATUS: GigabitEthernet2/5 (segment 1) is operational REP loses connectivity and gets back connectivity again. Conditions: This issue is seen whenever we have data traffic over subscription on a link. The issue is present in Cat 4K switches in all releases up to and including 12.2(50)SG6 and 12.2(53)SG1.
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