Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

DSL modem connection to Cisco 2811 Router?

Can I ask you about configuration of the Cisco router?I have a PLDT DSL modem connected to a LInksys DSL Router.This is working properly and can share internet to all workstations.

We purchased Cisco 2811 Router which has only 2 FastEthernet adapter.Is it possible to share internet thru Cisco Router only connected to DSL modem?

I tried this configuration---DSL modem -->Linksys DSL Router--> Cisco 2811 Router but it didnt work.

Here are the IP address that I used..

DSL modem --static IP from PLDT

Linksys DSL router :

FastEthernet0/0 :

FastEthernet0/1 :

Can u suggest what im going to do or the setup that im going to use?

Thank you very much.


Re: DSL modem connection to Cisco 2811 Router?

This scenario should work without problems..

But I see you are using ip address from same rage on both FastEthernets - 192.168.1.x.. Its any reason for this?? If yes you must turn on bridging on router. If not select some different transport network between Linksys and 2811

Let we say

Linksys DSL router :

FastEthernet0/0 :

I suppose FastEthernet0/1 is inside netwrok so it could be same -

Dont forget configure static route on 2811 with command

router(config)>ip route


Hope that helps, rate if it does

New Member

Re: DSL modem connection to Cisco 2811 Router?

I would suggest removing the Linksys DSL router from the picture.

You will want to set the DSL modem in bridge mode, which will allow the 2811 to connect directly to the modem and perform the authentication tasks as well as get the public IP given from the ISP.

You'll want to be sure that you have the PPPoE information from the ISP, as well as whether they use PAP or CHAP. Most of the time, you'll run into PAP.

You'll create a dialer interface on the 2811, which you'll configure to do the PPPoE setup through the modem.

This link is for an 870 ISR, but will apply to the 2811 for the dialer interface setup.