Cisco Bug: CSCsy75976 - AIS: Disabe blocked port triggers duplicate AIS error and doesn't clear
Feb 09, 2017
- Cisco Catalyst 6000 Series Switches
Known Affected Releases
Symptom: Remote Fault Indication (Dying gasp, Link Fault, Critical Event) from peer on a spanning tree blocked port would generate AIS protocol data unit at configured maintenance domain level for all the active vlans. Conditions: On a Catalyst 6500 series switches running software version 8.7(3) with ethernet-cfm AIS enabled. In this scenario, since AIS is generated much earlier before spanning tree or MVRP Converges, it is not feasible to stop the trigger of AIS in the first place. We can Still attempt to stop AIS after backup path becomes active and traffic resumes, But some number of FALSE notifications does reach to the customer domain MEPs Which might not be desirable. Moreover, we are not familiar with how other vendors Are handling these cases and no other BUs are supporting this configuration too as of now.
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Bug Details Include
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