hey other siders !!!

[wintermute000]

so was it working OK on the FEX, then you basically lost ARP when you moved it to the chassis port?

Did you try clearing ARPs? Was vPC involved?

smells like some kinda bug (a Nexus bug? You don't say!!!!! ROFL).

[icecream-guy]

so was it working OK on the FEX, then you basically lost ARP when you moved it to the chassis port?

Did you try clearing ARPs? Was vPC involved?

smells like some kinda bug (a Nexus bug? You don't say!!!!! ROFL).

no we lost ARP  when we upgraded the Nexus 5.1 to 5.2  only for the outside interface of the StoneGate FW-5000
tried clearing arp. the MAC never populated back to the ARP table on the 5.2 code on either side.  no vPC involved.

[icecream-guy]

Yay, Cisco was able to reproduced the issue in the lab.
Just wish I could stick around here until I found out the cause.
I'll have to stay in touch with the team and find out.

[wintermute000]

no you don't, mr security big shot!

[deanwebb]

Yay, Cisco was able to reproduced the issue in the lab.

Always a cause to celebrate!

Before the lab repro:



After the lab repro: