Configuring DHCP on Cisco routers to support Mitel

[marksb101]

I am currently searching for a way to remove a DHCP server at our NOC and configure the local Cisco router to handle the DHCP addressing. I can see how to configure the bulk of the DHCP portion, but in the M$ server there are a couple of parameters that I am unable to locate to make the DHCP kick back to the Mitel controller.In particular, setting scope options 130(Mitel IP Phone),132(Mitel VLAN), and 133(Priority).
By establishing dhcp at each remote location,this allow us to save some money by removing the DHCP server at the NOC and cut down on some of the chatter going across our WAN as well.

Thanks for any constructive directions,

Mark

 

[Mitel100]

You can use the following on the router:

option 128 ip 192.168.x.x
option 129 ip 192.168.x.x
option 130 ascii "MITEL IP PHONE"
option 132 hex 0000.0002
option 133 hex 0000.0005



Option 132 in this example is Vlan 2 and Option 133 is priority 5.

Hope this helps.


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[marksb101]

Thanks for the information, looks like this will work.
I will search Cisco site for further in-depth documentation.

 

[M1tel]

Heres a snipit of my config

interface GigabitEthernet1/0/8
description PBX
switchport access vlan 30
switchport voice vlan 30
spanning-tree portfast
!
interface GigabitEthernet1/0/9
description Desktops&Phones
switchport access vlan 21
switchport voice vlan 30
spanning-tree portfast
!
interface GigabitEthernet1/0/10
description Desktops&Phones
switchport access vlan 21
switchport voice vlan 30
spanning-tree portfast

 

[yeahbutno]

See below for info.Note that option 125 is now used for updated firmware for Mitel IP Phones as its vendor specific for Mitel.
Cisco Routers can be configured to provide DHCP services on the network. A typical customer configuration would be use the Cisco Router to provide DHCP services in the Data VLAN and use the 3300 ICP DHCP services in the Voice VLAN.

Body/Solutions
The following output was taken from a “show run” output of a Cisco router that is configured for DHCP services. This output is shown here as an example only, please change the IP parameters accordingly to match your network environment

ip dhcp pool DHCP
network 172.20.12.0 255.255.255.0
default-router 172.20.12.253
dns-server 172.20.12.3 172.20.20.3
option 128 ip 172.22.12.2
option 129 ip 172.22.12.2
option 130 ascii "MITEL IP PHONE"
option 132 hex 0000.0016
option 133 hex 0000.0006
option 125 ascii "id:ipphone.mitel.com;sw_tftp=172.22.12.2;call_srv=172.22.12.2;vlan=22;l2p=6;dscp=46"


Notice the following points in the above example:

* Mitel 3300 ICP IP address = 172.22.12.2
* Voice VLAN ID = 22 (16 IN HEX)
* The Data VLAN Subnet ID = 172.20.12.0 /C
* Option 125 is entered as ASCII type

 

[Hawaii5O]

I had similar problem. We ended up using otion 125 on the Cisco router but had to convert Ascii to hex in order for the router to take it.

 

[marksb101]

I have been successful with one location so far, I do not need option 125/128/129 at this location as we have a controller and it fails over to the local 3300 for addressing.
I have SIP locations without controller in which I will need the additional option lines 125/128/129 for the phones to get an address. I will make note of the additional notes for option 125. It has a little more information since mine was installed a couple of years ago. I have tested this in my lab and kind of have it working, it rejects and gets to option 128+ but will not get further because it cannot locate the controller listed in 125/128/129. I will be configuring a location with SIP in the next day, will let the group know how it works out.
The next hurdle is getting this to work with my main location which has at least 5 subnets(4 are used for phones). I have located the instructions and working on that next.
I found it mildly amusing that my VAR did not know how to complete this operation.

Thanks for the input.

Mark