Specific DHCP Options for 6900 Series?

[PhoneSlayer]

Hello,

I'm working on a new install and they've got a mix of 5320e, 6920, and 6940 phones. The 5320s boot fine. The 6900 Series phones either stick on 40% Waiting for DHCP or 90% Contacting Call Svr 0.0.0.0
When I provide a static address for the Call Server the 6900 phones will come up, but this is not ideal and I would like DHCP to do the job for me.

I read that the 6900s support Options 125 and 43. Is this a both or an either/or type scenario?
These are my current DHCP Options:
3 Router
125 Mitel
128 TFTP Server
129 Call Server
130 IP Phone Identifier
134 DSCP

Thanks in advance!

[Tech Electronics]

PhoneSlayer,

The 69xx series phones support option 125 which is the same as option 43 so you don't need both; it is recommended to use option 125.

Here is a basic option 125:
125=id:ipphone.mitel.com;sw_tftp=x.x.x.x;call_srv=x.x.x.x;l2p=6s3m4v6;vlan={VLAN ID};dscp=46s24m34v46

sw_tftp=TFTP Server IP Address <-usually the same as the call_srv
call_srv=Phone System IP Address
l2p=Switches Layer 2 Priority typically 6 for non-Cisco switches and 5 for Cisco type switches
dscp=Differential Services Code Point [Layer 3] is always 46 or their equivalent of Expedited Forwarding.

Thanks,

TE

[martyn]

What firmware do the 6900 phones currently have on them, and what brand of switch are they plugged in to?

[VinceWhirlwind]

What software version is the MCD?
 
Do your switches advertise the Voice VLAN via LLDP? Or do you have Option43 set on both the Data as well as the Voice VLANs?

[eugenej]

what DHCP server are you using? I assume this is a MiVB installation
like TE said you can use either 43 or 125 on the 69xx phones and 125 on the 53xx phones

Are you using multiple VLANS or flat network?

[Dogbreath]

My experience with 69xx is that they didn't work without option 43, despite the documents I read specifically saying that 125 and 43 would work. So on the same network, 53xx boot up and connect fine but 69xx didn't!

[Tech Electronics]

Guys,

I have had all of mine working to date with option 125 without fail. The only issue I have had with 69xx series phones was with the TFTP not have an older version of firmware to upgrade the phones. Apparently if it is too low on firmware it will not upgrade properly and the phone will reboot constantly after it has be reset once.

Thanks,

TE

[petr.necas]

We just installed one new 6940 today and we had the same issue, the problem was that switch where the phone was connected to did not support LLDP-MED and the phone got an IP from the default VLAN where the OPTION 125 was not configured. Solution was to set the voice VLAN manually on the phone.

[Tech Electronics]

petr.necas,

Yes, LLDP-MED/CDP are pretty much required for seamless use, but you could also try using a DHCP Helper Address or what some call an IP Helper Address on that VLAN for when it send out its BootP request for DHCP it get directed to the correct DHCP server.

Thanks,

TE

[biggie]

Check the IP/XNET Trunk form has a valid IP address for the local controller also, apparently the 69xx series look at this address when registering to the controller also.

[VinceWhirlwind]

Just configure the Option125 on the Data VLAN, so if any switch doesn't give the phone its Voice VLAN via LLDP the phone will get it from DHCP on the Data VLAN and then reboot into the Voice VLAN.