Description:

In the nvOS.log on an EMSA appliance, there are many "MOVING MAC" messages:

Sep12.21:53:40.nvOSd_bcast.c:523: nvOS_l2_entry_check_and_add: MOVING MAC = 0x0:23:e9:36:a2:44, IP = 172.16.1.124 from port 41 => 30
Sep12.21:53:40.nvOSd_bcast.c:523: nvOS_l2_entry_check_and_add: MOVING MAC = 0x0:1:d7:c2:bd:c4, IP = 172.16.1.104 from port 30 => 41


Symptoms:
The MOVING MAC issue will cause interruptions in the connectivity roughly every 30 seconds. Sometimes these “pauses” will be long enough to drop a connection. On occasion it just appears as intermittent delays in packet arrival.
Cause:
N/A

The “MOVING MAC” indicates the uplink trunk is misconfigured. The network side switch has the far-end ports of the 41/42 uplink cables, both active at the same time which is incorrect.  Either they are not “trunked together” or they are configured in an Active-Active mode, instead of the desire Active-Passive (fast) mode. A short term workaround to this problem is to disconnect one of the cables from the appliance. This will avoid the potential performance problems related to the uplink trunk being misconfigured.

Many "MOVING MAC" messages being reported in nvOS.log on EMSA appliance.