cisco 1481 router config for lan/voip link over T1
Posted on 2010-09-14
I sure hope one of you can see what the heck I'm doing wrong here and help me out of this nightmare lol I am in the process of reversing a Voip / Lan setup. My clients build a new office about a year ago, and originally we had things setup to provide a voip gateway via a T1 line from the old office to the new office, thus elimating moving trunks etc.
Well now they have moved the bulk of thier operations to the new building and along with this came moving the trunk lines and the BCM (Nortel BCM 400). However I still need to provide access to both the computer network and the phone system for about a 1/2 dozen users at the old building.
I reconfigured their two Cisco 1841 routers, primarily just changing the ip addresses and routing commands to match thier new subnets. Yes we traded them out as well. However now, even if I manually configure the Nortel Ip phones they still come back with a sever unreachable message.
I have also attempted to setup the routers to provide dhcp, but then I just get a dhcp parse error on the phones (something to do with the formating of DHCP Option 128? Very wierd.
Here is a basic rundown on my current setup.
Nortel BCM configured at ip 192.168.2.1 mask 255.255.255.0 running dhcp for local clients. This is connected to a Nortel POE switch which goes out to all the local handsets (which all work just fine running dhcp) and to the first Cisco Router.
The cisco router at main office is configured as follows
Connection to the local Lan (Windows Server 2003 / Vista workstations).
Ip addrsss 192.168.4.254 255.255.255.0
Connection to BCM
Ip address 192.168.2.2 (originally had this set as 192.168.2.254 but there is some other device (which I have no clue what it is) using that address. I'm still working on figuring out what that is.
Connection to remote office
ip address 192.168.254.2
ip route 192.168.3.0 255.255.255.0 192.168.254.1
ip route 192.168.1.0 255.255.255.0 192.168.254.1
ip route 192.168.4.0 255.255.255.0 192.168.4.1
ip route 192.168.1.0 255.255.255.0 192.168.1.1
ip route 0.0.0.0 0.0.0.0 192.168.4.253 (Routes all internet traffic to local ADSL router)
Remote office Router Config
Lan Link to Main office
ip address 192.168.3.254
Interface Fastethernet 0/0
Voip Link to BCM
Ip address 192.168.1.254
T1 link to main office
Ip address 192.168.254.1
ip route 192.168.4.0 255.255.255.0 192.168.254.2
ip route 192.168.2.0 255.255.255.0 192.168.254.2
ip route 0.0.0.0 0.0.0.0 192.168.3.253 (Routes all internet traffic to local ADSL router)
I have also tried (without much success) seting up dhcp on the routers but keep running into that issue with DHCP Parse errors on the phones.
Can anyone point me in the right direction here? I should point out that the LAN side works fine. I established a remote access link back to the main server without issues. Also, from the remote router I can ping both the main router and the BCM, so the link seems solid, just have to get the right info to the phones at this point.
Thanks, any help will be Very much appreciated.