Mitel DHCP options on Cisco router

[pea123]

Hie to you all.
I have some IP phones that need to be connected at a remote site. The remote site does not have a MS Dhcp server.
I was thinking of configuring the mitel 3300 dhcp options on the router so that I do not have to manually enter static IP addresses on the phones since they are plenty.
I was wondering if it is at all possible to use the Cisco router to do this & how the configs are done.

Thank you.

 

[techymitel]

I would configure a helper address on the cisco router to point back to the 3300 controller. Then you can configure dhcp options on the 3300 for the remote subnet.

techymitel

 

[Billz66]

We have done both Ip helper ( and create a new scope on the MCD ) and using a cisco router as shown below


This is for a Customer with PABX IP address 172.20.62.2 L2 P5 DSCP 46

The DHCP scope will be provided at a remote site with
Voice Vlan 100
IP range 172.20.65.100- 172.20.65.199
Subnet 255.255.255.0


Set Exclusions to limit address range to 100-199

ip dhcp excluded-address 172.20.65.1 172.20.65.99
ip dhcp excluded-address 172.20.65.200 172.20.65.254

Provide Voice DHCP pool

ip dhcp pool VOICE
network 172.20.65.0 255.255.255.0
default-router 172.20.65.3
option 125 ascii "id:ipphone.mitel.com;sw_tftp=172.20.62.2;call_srv=172.20.62.2;vlan=100;l2p=5;dscp=46"
option 128 ip 172.20.62.2
option 129 ip 172.20.62.2
option 130 ascii "MITEL IP PHONE"
lease 7



If I never did anything I'd never done before , I'd never do anything.....

 

[pea123]

When I attempt to add an option, I get a message -> %This version of PT does not support options other than 150 <-
Im now stuck on how to add the options as advised above.
Help!

 

[Billz66]

It possibly relates to an incompatible IOS on the CISCO router.
Try adding the ip helper instead

If I never did anything I'd never done before , I'd never do anything.....

 

[Webmany]

What cisco router is this?

 

[tdmneil]

This should do it- (192.168.10.0 being the phone subnet and 192.168.20.0 being the data subnet, in this instance 192.168.10.2 is the 3300 and 192.168.10.254 is a L3 switch which does the intervlan routing)

ip dhcp excluded-address 192.168.10.1 192.168.10.10
ip dhcp excluded-address 192.168.20.1 192.168.20.10
!
ip dhcp pool PHONES
network 192.168.10.0 255.255.255.0
option 125 ip 192.168.10.2
default-router 192.168.10.254
dns-server 192.168.10.20.1
option 128 ip 192.168.10.2
option 129 ip 192.168.10.2
option 130 ascii "MITEL IP PHONE"

There are some IOS versions (around 124.24 ish) if I remember correctly that have issues with adding Ascii text strings, it just won't accept the option 130 command.

Hope this helps!