Cisco 1721 WAN configuration

[LittleFishy]

I have just got two 1721 routers (with WAN serial ports). I want to connect two separate sites together over a leased line with an x.21 port. These sites are on the same Win2K domain, but using two separate IP structures, one structured is 172.31.0.0 subnet 255.255.0.0 the other 6.0.0.0 with subnet 255.0.0.0

I need to configure it so that the traffic from the 172.31.0.0 end going to 6.0.0.0 goes via the WAN and all other traffic goes to our Cisco PIX firewall (internet traffic). The reverse needs to happen at our other site. I have no idea where to start, so any help would be appreciated.

 

[verland]

Here's a start:




































Site A (6.0.0.0 net, pix, wan router)




































set all machine's default gateway to the lan ip of site A's wan router




































add a default gateway to the wan router pointing to the pix (this is how everyone will get internet access, and you won't need to mess with the pix this way)




































add a route in the router for network 172.0.0.0 to the wan ip of Site B's router









































































Site B (172.0.0.0 net, wan router)




































set all machine's default gateway to the lan ip of site B's wan router




































add a route in the router for network 6.0.0.0 to the wan ip of Site A's router









































































This is very simple setup and is missing some details (your pix might need some work, among other things). The numbers are wrong, a CCIE would tear this to pieces, but without knowing everything about your operation it's hard to get detailed. There's also a couple different ways to do it, but this should get the ball rolling. Also if you pick up a CCNA training book or the like it will all the info you need to do this. Hope it helps, have fun!

 

[ChrisAC]

6.0.0.0 /8? What an odd choice of IP scheme! Any particular reason why?

Chris.
**********************
Chris Andrew, CCNA, CCSA
chris@iproute.co.uk
**********************

 

[LittleFishy]

Thanks for the help. The 6.0.0.1 structure was set-up before my time and has become so integrated into the system it would be very difficult to change it, however much I would like to. Does anyone have an example config for me to just have a look at.