DHCP reservation by vendor

[busster]

We are getting ready to connect Polycom VoIP phones to our network. We would like to set up a DHCP reservation scope for all Polycom phones. Without putting in each individual MAC address, is there a way to filter by the vendor id?

 

[chipk]

Please provide more info about your physical network as well, as this will affect how your phones get addressed.

In answer to your question, check out these articles:

http://technet2.microsoft.com/Windo...1e28-4c25-ba20-67daeffa5d1b1033.mspx?mfr=true

http://support.microsoft.com/?id=240247

 

[busster]

Was hoping to have a separate range of ip addresses setup for ip telephones, on a separate vlan. Using dhcp, wanted to hand out normal ip information, address, gateway, dns plus send vlan and tftp server to the ip phone. Was hoping MS DHCP would use vendor class to "filter" by vendor MAC to supply the DHCP.

Articles look like it should work, testing on win2k now, but will be using 2003 server.

Setup in lab, and dhcp hands information out to all, not just the vendor mac addresses desired.

 

[chipk]

From what I recall in my last job where we used VoIP (Avaya phones, though), we configured the voice vlan on the switchports and didn't have to do anythign funky with vendor classes on DHCP. We just used the command: "switchport voice vlan xxx" on our Cisco switches.

 

[Davetoo]

If you're going to put your phones on a separate VLAN, then you just need to create a scope on your DHCP server for that VLAN.

I'm Certifiable, not cert-ified.
It just means my answers are from experience, not a book.

There are no more PDC's! There are DC's with FSMO roles!

 

[busster]

Agreed, but how does the DHCP server know to hand out one set of rules to non IP phones and another to IP phones? I assumed vendor class would work.

 

[chipk]

Using the command I referred to (if you have a Cisco network) or putting all the phones in another switch in a different VLAN, which would be associated with your new scope...

 

[Davetoo]

You said you were putting your IP phones on a separate VLAN...when the request comes in from that VLAN to the DHCP server it will hand it an IP from the scope for that VLAN.

I'm Certifiable, not cert-ified.
It just means my answers are from experience, not a book.

There are no more PDC's! There are DC's with FSMO roles!

 

[mattKnight]

Um

The usual way of doing this is to pass the parameters through a config file stored on a TFTP server, which shoud allow you to chnage the VLAN setting for the phone. As you probably know, the polycoms pick up the TFTP server address from the option66 in the DHCP scope. Most other devices, won't recognise this option and will quietly ignore it.



Take Care

Matt
I have always wished that my computer would be as easy to use as my telephone.
My wish has come true. I no longer know how to use my telephone.

 

[allywilson]

chipk is the route I would follow, but my experience is the same as his.

Avaya phones have 2 ports on the back so you can have your workstation connected to that and just use 1 port on the cisco PoE switch.

The port config on the cisco switch should be similar to what he advised.

switchport voice vlan 1 <-- for voip access.
switchport access vlan 2 <-- for data access.

Your DHCP config should also reflect the DHCP 66 option to point them at the TFTP server.