nortel ip phones cisco distribution switches

[phoenix]

Hi,

I have the following config on Cisco  core switch and all dhcp parameters configured on dhcp server as  given in Michaels dhcp solution for NorteIP Phones.
Nortel IP phones 1150E works fine for me in cisco core switch catalyst 6509.The working config in catalyst 6509 is

interface GigabitEthernet x/x
 switchport
 switchport access vlan 10
 switchport mode access
 switchport voice vlan 20
 no ip address
 spanning-tree portfast.

Both data and voice are working fine for this configuration.
With this config when I connect to Cisco core switch ,Nortel ip phone is working fine and getting the ip from dhcp server from the pertaining voice scope,my laptop is getting ip from data vlan.
But in same environment in  other distribution switches catalyst 4006,catalyst 3458 xl,2960 this cisco config  is not working.
Data is working but voice (Nortel ip phone 1150E) is still in “starting DHCP server “ or “DHCP server unreachable”
If I trunk both data and voice in cisco switch ,both voice as well as data  are not working.
Please provide a solution for making the Nortel IP phones work with  distribution switches .

[Michael McNamara]

Hi phoenix,

I don't know that anyone is going to have a "solution" for you... more likely your going to need to troubleshoot the problem and try and determine what's going wrong where. All those other switches you mention support LLDP-MED (802.1ab)? and/or are running the appropriate software level/release?

Here are some places where I would look if troubleshooting this problem;

1. Are any DHCP requests making it to the DHCP server (turn on debug logging on your DHCP server)
2. Is the switch detecting the edge device via LLDP?
3. Perform a packet capture on the switch port in question to see what traffic the IP phone is sending and receiving.

Good Luck!

[phoenix]

Hi Michael.

Thanks for your answer.

for these questions,my doubts are asked below

(1) All those other switches you mention support LLDP-MED (802.1ab)?

Should all the switches be LLDP enabled for working of these phones.I mean LLDP should be supported in the interface level of these switches to make the ip phones work.

I assume for compatability of cisco and Nortel IP phones ,cisco switches should be LLDP enabled.

When I checked for LLDP in one of the edge switch there was no LLDP found in that switch.

(2) and/or are running the appropriate software level/release?

Please advice the approriate level of software realeases in cisco switches for Nortel IP phone 1150E.

Thanks