ISC DHCP and Option 125 1

[ManagerJay]

I am in the process of trying to move my DHCP for my Mitel 3300 to an ISC DHCP server. For some reason, the phone hangs when booting with a message stating "Option 128 missing."

Following is my dhcp configuration file.
option MITEL_46 code 46 = string;
option MITEL_125 code 125 = string;
option MITEL_128 code 128 = ip-address;
option MITEL_129 code 129 = ip-address;
option MITEL_130 code 130 = string;
option MITEL_132 code 132 = unsigned integer 32;
option MITEL_133 code 133 = unsigned integer 32;
option MITEL_134 code 134 = unsigned integer 32;

subnet 10.129.40.0 netmask 255.255.255.0 {
range 10.129.40.200 10.129.40.250;
option subnet-mask 255.255.255.0;
option netbios-name-servers 10.129.40.1;
option routers 10.129.40.1;
option domain-name-servers 10.129.20.40;
option MITEL_46 08;
option MITEL_125 "id:ipphone.mitel.com;sw_tftp=10.129.41.10;call_srv=10.129.41.10;vlan=100;l2p=6;dscp=46";
# option MITEL_128 10.129.41.10;
# option MITEL_129 10.129.41.10;
# option MITEL_130 "MITEL IP PHONE";
# option MITEL_132 100;
# option MITEL_133 6;
# option MITEL_134 46;
# option interface-mtu 1456;
}

subnet 10.129.41.0 netmask 255.255.255.0 {
max-lease-time 86400;
default-lease-time 86400;
range 10.129.41.200 10.129.41.250;
option subnet-mask 255.255.255.0;
option routers 10.129.41.1;
option domain-name-servers 10.129.41.1;
option MITEL_46 08;
option MITEL_125 "id:ipphone.mitel.com;sw_tftp=10.129.41.10;call_srv=10.129.41.10;vlan=100;l2p=6;dscp=46;ipa_srv=10.129.10.46";
# option MITEL_128 10.129.31.10;
# option MITEL_129 10.129.31.10;
# option MITEL_130 "MITEL IP PHONE";
# option MITEL_132 100;
# option MITEL_133 6;
# option MITEL_134 46;
}


I'm sure this is something simple that I have missed.

Thanks for your help.



Jay

 

[nytalkin]

did you remeber to turn of dhcp in the 3300?

NO GOOD DEED GOES UNPUNISHED!

 

[ManagerJay]

Yes, I did. I was reading the Mitel docs that I have and they mention options 124 and 125 should be used together (if I am understanding this correctly). And, option 124 contains vendor specific information.

Any ideas?

Thanks,


Jay

 

[kwbMitel]

Does the phone respond with an Ack followed by releasing before hanging?

If so the issue is probably in your VLANing

*******************************************************
Occam's Razor - All things being equal, the simplest solution is the right one.

 

[ManagerJay]

Yes, it does. And, if I leave the options 128-132 in the configuration file, the phone will boot normally. Using the 3300s DHCP server, the phone will boot using option 125.

Thanks,


Jay

 

[kwbMitel]

The phone is ACKing and Releasing the first DHCP so the issue is not in your ISC DHCP server. The issue is occuring after the phone switches to VLAN 100 and Looks for the 3300.

At this point the issue is either in the DHCP of the 3300 or in the VLAN Config.

Most likely reason is the ISC DHCP server has visibility of VLAN 100 and the phone is stuck in a loop.

Next most likely reason is the port the phone is on does not have access to VLAN 100

Next would be the 3300 cannot see VLAN 100

Next would be the DHCP settings in the 3300 are wrong.

The best troubleshooting method would be to remove DHCP from the equation and statically assign the phone settings. This will establish if the phone can communicate with the 3300.

Results from there will determine the next step.



*******************************************************
Occam's Razor - All things being equal, the simplest solution is the right one.

 

[nytalkin]

Get the "DHCP Option 125 Config Helper" from the download page at Mitel on Line (3300 software download page). It supports DHCP service on XP, Windows 2000 & 2003.

NO GOOD DEED GOES UNPUNISHED!

 

[Mitelpassion]

you could try option 43 too.

 

[kenny5445]

Hi am i correct in saying your using a Linux dhcp server using dhcpd...

Option 125 doesnt appear to work with linux but as the previous poster stated option 43 does work. (been using this for almost a year).

cheers

 

[Mitelpassion]

hi,

A collegue of mine installed using a linux DHCP server using option 125. Will try and get specifics. Option 43 did work for me about 2 years ago though.

 

[ManagerJay]

If you could get the specifics, that would be great!

Thanks,


Jay

 

[kenny5445]

Hi Jay, here is my working dhcp config


#custom options
option IP-phone-TFTP-Server-IP-Address code 128 = ip-address;
option IP-phone-TFTP-Server-IP-Address 192.168.243.244;

option RTC-IP-Address code 129 = ip-address;

option RTC-IP-Address 192.168.243.244;

option IP-phone-DHCP-Server code 130 = string;
option IP-phone-DHCP-Server "MITEL IP PHONE";

option Phone-Analyser code 131 = ip-address;
option Phone-Analyser 192.168.247.195;

option mitel-option code 43 = string;
option mitel-option = "id:ipphone.mitel.com;sw_tftp=192.168.243.244;call_srv=192.168.243.244;vlan=2;l2p=6;dscp=46;ipa_srv=192.168.247.195";