DHCP relay issue with Nexus 3K

[elie_ibrahim34]

Hello all,

I have a strange issue with some Cisco IP Phones.

Recently we installed a couple of Nexus 3548 in our network, they are configured with vPC and HSRP, there are 2 catalyst 9300's for distribution connected via port-channel to the Nexuses.The problematic phones are plugged into an access switch connected to the distribution switch.

The problem i have is that my phones are not getting dhcp addresses from our server on a different subnet.

I have the dhcp feature enabled and configured the ip dhcp relay address under all my SVI's.

A wireshark capture shows the DHCP Discover transaction as being a broaddcast. Correct me if im wrong, but this should be a unicast request? 

I have built a test vm that i placed in the same vlan as my phones, and i do get an IP via DHCP.

Any ideas? Your help is greatly appreciated!

[Georg Pauwen]

Also, can you post the config for one of the switchports where the voice vlan and the access vlan are configured ?

[elie_ibrahim34]

Taking off the HSRP config will not be possible , since this is production, im not sure the extent of the impact it will do

However here is the config on one of the switchports where a phone is attached
interface FastEthernet0/11
switchport access vlan 11
switchport mode access
switchport voice vlan 33
spanning-tree portfast
end

Thanks for your help!

[elie_ibrahim34 · Accepted solution]

Working on this with TAC

Closing this thread

[jinlunanj]

hi,guys;

    I also have the same problem. Is TAC confirmed to be a bug? Still need to add other configurations，

Thank you very much for your reply

[elie_ibrahim34 · Accepted solution]

Upgrade to 9.2.2 . This worked for me