DSL Routing

Unanswered Question
Feb 1st, 2008


I have two 2811 Routers. Can I connect them using DSL lines from ISP on two ends? What would I need to implement it. It is just for connecting two offices.



I have this problem too.
0 votes
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 5 (3 ratings)
Paolo Bevilacqua Fri, 02/01/2008 - 13:50

Yes, if you don't need encryption, simply use gree tunnels;

int tunnel0

ip address

ip mtu 1476

tunnel destination

tunnel source


ip route tunnel 0

Nothing else is required.

Hope this helps, please rate post if it does

pranav_motiwala Fri, 02/01/2008 - 14:26

Thanks for the prompt reply,

Can I have one WIC card on each side of the router and assign it the public IP given by the ISP and define a static route on it?

thanks again.


Paolo Bevilacqua Fri, 02/01/2008 - 14:51

Yes, the static default route.

Please complete your basic configuration first, make sure from inside you can access the internet, then do the tunnel configuration.

pranav_motiwala Fri, 02/01/2008 - 15:33

So all I need is two DSL modems and two routers that connects in this fashion:

RJ11->DSL Modem->Ethernet interface of DSL Modem -> E0/0 of Router -> Switch.

Thanks for the help. I appreciate.

pranav_motiwala Fri, 02/01/2008 - 15:36

Or can I have the RJ11 plug in directly into the WIC card of the router?



Paolo Bevilacqua Fri, 02/01/2008 - 15:47

Yes, the dsl line goes into the dls wic. But you need to configure the router first, for this you need to ask your ISP, if they use PPP or what else, end the VPI/VCI values.

Be aware that if you have never done it before, it can be very difficult to get routers to do what you want, so consider hiring someone experienced.

[edit - forgot to thank you for the nice rating and good luck. Come back once you got the info from your ISP]

pranav_motiwala Fri, 02/01/2008 - 16:09

Thanks a lot for your answers and helping me with paitence.

I have one more query to his subject:

Can I extend my LAN to site B. That is I want to have one subnet on both the sites. Is it possible using DSL line or do I have to go by Lease lines?



Paolo Bevilacqua Fri, 02/01/2008 - 16:22

By all means avoid having the same subnet on both sites because that would make everything more difficult. All your applications will work with two different subnets, do not worry about it.


This Discussion