Your recommendations on what is the possible underlying cause in such instances ? Are there any more show commands which can help diagnose the issue of link flapping ?Ģ. I have manually shut/no shut this interface and can't see any CRC errors.ġ. As can be seen from the logs that the L2 goes down/up frequently causing an MGCP gateway re-registration messages on the NMS.
Some relevant show commands are given below for a cisco router whose L2 on Serial interface seems to be going up & down.
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