Nortel IP phone on a Cisco switch

[paul.p]

A customer wants to use Nortel IP phones and they have Cisco 3524 switches. The voice and data are in different VLANs, and the computers are plugged into the IP phones. I can specify on the phone which VLAN to use. Should the switch port be set up for dot1q trunking? How can I set the switch port to use Diffserv?

Thanks

[CKBudrodeen]

If your phones are on a different VLAN to the PCs, then you must configure the switch port for trunking.

The phone should take care of QoS i.e. it should arrive at the switch correctly marked - I know this is the case with Cisco IP phones, and I'd be confident it is the same with Nortel.

Regards.

[paul.p]

Nortel tells me their IP phones do not do dot1q trunking.

[CKBudrodeen]

That would be a problem.

The only solution would be to put the phones & the PCs in the same VLAN. Whilst this is not good design, it does work - this was the way we first set up our Cisco IP Phone/PC network, and we didn't have any noticable problems. We did change the design later on to split into two VLANs.

Depends on what sort of loads are on the LAN.

[paul.p]

I have done just that as a temporary solution. There are only about 15 devices on the network at each location. It is too soon to tell if the service is acceptable. Thanks

Paul