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Webcast-Catalyst9k
New Member

Voice VLAN on 2900XL switch questions

I am having problems getting an IP telephone to obtain a DHCP address with a 2900XL switch (Version 12.0(5.2)XU)

data vlan =1

voice vlan = 32

I configure the port

>>switchport voice vlan 31

>>switchport access vlan 1

A pc connected off the phone gets the proper DHCP address - but the IP telephone does not receive dhcp address.

I change the config and only connect a PC

>>switchp access vlan 31

plug the PC in and it gets proper vlan 31 dhcp

plug the IP phone in and it does not get dhcp address.

this works fine on 2950, 2960, 4506 switches - 1st time I have tried on a 2900XL - am I missing something?

3 REPLIES

Re: Voice VLAN on 2900XL switch questions

Hi Friend,

This config will not work on 2900XL/3500XL switches. You have to configure the switch ports as trunk ports. Do the following:

Int fa 0/1

Switchport trunk encapsulation dot1q

switchport mode trunk

This has to be in case of older 2900XL/3500Xl switches. On the new switches you have to do the same config as you have tried above

Do the same and let us know your inputs

HTH, Please rate if it does.

-amit singh

New Member

Re: Voice VLAN on 2900XL switch questions

Thank you for the response - setting up the port as a trunk solved my problem.

Re: Voice VLAN on 2900XL switch questions

Hi Friend,

I am glad to hear that your problem has been solved and appreciate your ratings on the same.

I would request you for frequent visit on the forum.

-amit singh

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