Default route when dialed out to ISP

[jdl508]

Hello, I have a 2621 connected to a t1 to a wan site. I can ping servers on the other site unless I am dialed out to the internet through a dial up acct. Is there any way to rectify this. I did a trace and it showed that while dialed out i go to a foreign ip but when no dialed out im there in 3 hops. thanks
jdl

 

[scaine]

Usually, when you initiate a dial-up connection, you receive (via the connection) a new default route. You can see this on NT/2000 boxes by called up a command prompt and typing 'route print'. What this means is that all traffic will try to go out through the dial-up connection to get to it's destination.

In order to prevent losing access to the servers on the other side of your 2621 router when you dial-out, you need to add a couple of persistent routes. In other words, you have to specify how to access those networks explicitly.

Assuming NT/2000 :
If your router is 192.168.0.1 and the network on the other side of the router is (say) 10.100.0.0/16, then you need to type into your PC's command prompt:
route add -p 10.100.0.0 mask 255.255.0.0 192.168.0.1

The -p will make the route addition persistent - which means that it will survive a reboot.

Please note that you'd have to type this for every network on the other side of the 2621 and you'd have to do this for every PC that may make a dial-up connection. If you use DHCP, you could specify these routes that way and get it out to your clients far quicker.

Hope that helps.