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New Member

N7K Log messages

Hello everyone!

One of our end customers noticed the following log messages appearing multiple times on his N7K running  version 6.0(4):

%MTM-SLOT8-2-MULTICAST_SOURCE_MAC_LEARNT: Inserted dynamically learnt multicast source mac [MAC_ADDRESS] Please execute from switch: clear mac address table dynamic multicast-entries

%L2MCAST-SLOT8-2-L2MCAST_MAC_FULL_LC: Failed to insert entry in MAC table for FE 0 swidx 1 (0x1) with err (mac table full). To avoid possible multicast traffic loss, disable OMF. Use the configuration CLI: "no ip igmp snooping optimise-multicast-flood"

I found very little information about these log messages (only on and 

The first link I provided pretty much explains the second log message but I cant find any explanation for the first log message.

I would appreaciate any input you have on these log messages.


Thanks in advance!


Everyone's tags (1)
New Member

Have you made any progress on

Have you made any progress on this issue?

New Member

I had a similar problem.

I had a similar problem. While investigating for another issue it was found that a SFP on one of the downstream switches connected to the Nexus 7K was faulty and generating errros. Replacing this SFP stopped the generation of these multicast error messages