Question : I have Nortel Phones Running Over a Cisco Network - Nortel Phones will not pick up a DHCP address from the Voice VLAN

I have Nortel Phones (i2004) running over a Cisco Network (catalyst 4500 Switches). I want the phones to use a dedicated Voice VLAN. But when the phone boots up, it obtains an address from the data VLAN, and does not progress any further.


On the DHCP Server.
I have a scope for my Data VLAN (vlan8)
With the correct subnet,  in the scope options I have configured options 191 VLAN & 128 VLAN.

I have configured the same options within the Voice VLAN (vlan2) scope.

option 191 = VLAN-A:2.
option 128 = Nortel-i2004-B,s1ip=172.80.16.30;p1=4100;r1=1;255;bt=y.

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Below is my Configuration from the switch, which I believe to be good.

interface GigabitEthernet1/5
 description User Port
 switchport access vlan 8
 switchport voice vlan 2

interface Vlan2
 description Voice VLAN
 ip address 192.168.2.254 255.255.255.0
 ip helper-address 192.168.1.10
 no ip redirects

interface Vlan8
 description Data VLAN
 ip address 192.168.8.254 255.255.255.0
 ip helper-address 192.168.1.10
 no ip redirects
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Answer : I have Nortel Phones Running Over a Cisco Network - Nortel Phones will not pick up a DHCP address from the Voice VLAN

Try adding this command to the port;

switchport voice vlan dot1p

harbor235 ;}