We've implemented Microsoft NLB before, but it's not a common thing for our environment, consequently I've not looked at the config in a while. The topology is:
EDGE == 3750X's (stack of 2) == N5K's (vpc'd together) == Blade switches == servers
Looking through our existing config.. I see static ARP entries in the 3750 (which make sense to me), and in the N5K I see static MAC address-table entries. the thing is that there are 3 static ARP entries (all 3 are NLB clients of ours), but only one static MAC address table entry, but all 3 are working without issue. So it got me thinking..
Do I need to include the static MAC address entries in the N5K? I am pretty sure the only contention with NLB was telling the L3 device, that 'yes you can send this unicast response back to this multicast MAC' by making a static ARP entry. Thanks for any clarification.