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How exactly does the ARP table on a Nexus 7010 get populated?

Needing to know how exactly the ARP table on a Nexus 7010 gets populated.

I occasionally see an entry in our core switch (Nexus 7010) ARP table that maps the IP address of a loadbalancer virtual service to an incorrect MAC address. When this happens, the virtual service loses functionality, until I manually clear out the entry from the ARP table, or it times out.

I am trying to determine how this incorrect ARP table entry is getting there.

Any help would be appreciated.
 

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