We are having issues with our phones not pulling down DHCP info. My question is this. On a single campus network (all behind one router), do i need the ip helper-address command. If so, do I apply it on the sub-interface of the router, or the virtual interface of the switch, or both. Also, does my switch need a virtual interface at all.
The DHCP pool is located on the GW router.
If I manually configure the IP information on the phone, it will come up. I then can go back to DHCP and the phone works fine.
your config is fine. Can you check with "debug ip dhcp server packet" and "term mon", what is going on. Also, which phones are you using and which FW on the.