I need to setup a IOS dhcp server for nortel voip phones. I have info on what the phones does during dhcp handshake:
1. Requests options (via option 55) 43, 128,144,157,191
2. It gets an address and a option with the vlan it should be on (voice vlan)
3. It drops the address and re-requests its dhcp info form the voice vlan
I am using Version 12.2(18)SXE2 on 6509 720 supervisor. I am setting up a voice vlan for phones. Does anyone know how to configure DHCP raw options to allow nortel phone to attach to voice vlan and obtain voip ip address?
Option 191 should be used to tell what vlan to attach to for voice.