Guest

Preview Tool

Cisco Bug: CSCur64955 - CFM invalid level CCMs taking too long to time out, delay in show cmds

Last Modified

Jul 30, 2018

Products (1)

  • Cisco Carrier Routing System

Known Affected Releases

4.3.1.CE

Description (partial)

Symptom:

On a Cisco IOS-XR router with Ethernet CFM configuration. When a local MEP is receiving CCMs containing the wrong maintenance domain level from a peer MEP, the following symptoms may be seen:
 - When CCMs with the wrong level are first received from the peer, a timeout notification may follow shortly (e.g. via SNMP trap or logging), even though CCMs with the wrong level are still being received from the peer
 - When CCMs stopped being received from the peer, the peer MEP may not be marked as timed out as quickly as it should be.
 - When querying CFM local or peer MEPs operational state, either by the cli (e.g. <CmdBold>show ethernet cfm local meps<noCmdBold>) or XML, up to a 5 second delay may be seen before results are returned.

Conditions:

The Symptom is only seen when there is Ethernet CFM configuration, with at least one local MEP configured, the local MEP's CCM processing is offloaded to software/hardware (this can be checked by running <CmdBold>show ethernet cfm local meps detail<noCmdBold>), and the local MEP is receiving wrong level CCMs from at least one peer MEP.
Bug details contain sensitive information and therefore require a Cisco.com account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.