Symptom

A Nexus 9000 switch may occasionally generate or receive an ARP Request that refreshes an existing ARP entry. This ARP Request packet is a unicast packet with a destination MAC address of another device on the network. However, this ARP Request packet is flooded out of all interfaces carrying the relevant VLAN as if it were a normal broadcast ARP Request packet.

Conditions

1. Nexus 9000 switch with at least one up/up SVI. 2. Unicast ARP Request packets are observed on connected devices that do not own the destination MAC address.

Workaround

There is no known workaround for this issue at this time.

Further Problem Description