configuring cisco 2811 with two ADSL lines by different ISP for redundancy

Vishal Nath · 12-19-2007, 05:54 AM

I have got a setup where we have two adsl router with different ISP's connected to switch for redundancy. Now a customer has bought a new cisco 2811 router and he want configure the router in a way that both adsl connection can be configured for redundancy in cisco 2811. How is it possible since both the ADSL lines are RJ11 and cisco router doesn't come with RJ11 port. and is redundancy possible

**johnwill** · 12-19-2007, 02:07 PM

You need ADSL modems in front of the router.

Vishal Nath · 12-20-2007, 08:38 AM

Quote:

Originally Posted by johnwill

You need ADSL modems in front of the router.

Thank you for the reply, But I want to know how will I make connection between adsl router and cisco 2811 router. Since ADSL router also do routing , than if I configure a PPPoE on my router , then also I need a adsl router

**johnwill** · 12-20-2007, 11:53 AM

Well, that's not the question you asked. You specifically mentioned RJ11 connections, so one can only assume that was direct from the telephone line, no?

I'd put the ADSL router into bridge mode to eliminate the issue of dual NAT. If that's not practical, you can always configure the channels of the Cisco router in the DMZ of each of the two ADSL routers.

12-19-2007, 05:54 AM	#1 (permalink)
Vishal Nath Registered User Join Date: Dec 2007 Posts: 2 OS: microsoft window 2003 enterprise edition	configuring cisco 2811 with two ADSL lines by different ISP for redundancy I have got a setup where we have two adsl router with different ISP's connected to switch for redundancy. Now a customer has bought a new cisco 2811 router and he want configure the router in a way that both adsl connection can be configured for redundancy in cisco 2811. How is it possible since both the ADSL lines are RJ11 and cisco router doesn't come with RJ11 port. and is redundancy possible

12-19-2007, 02:07 PM	#2 (permalink)
johnwill Manager, Networking Forums Join Date: Sep 2002 Location: S.E. Pennsylvania, US Posts: 41,899 OS: Windows 7, XP-Pro, Vista, Linux Blog Entries: 1	Re: configuring cisco 2811 with two ADSL lines by different ISP for redundancy You need ADSL modems in front of the router. __________________ If TSF has helped you, Tell us about it! or Donate to help keep the site up! Microsoft MVP - Windows Desktop Experience

12-20-2007, 11:53 AM	#4 (permalink)
johnwill Manager, Networking Forums Join Date: Sep 2002 Location: S.E. Pennsylvania, US Posts: 41,899 OS: Windows 7, XP-Pro, Vista, Linux Blog Entries: 1	Re: configuring cisco 2811 with two ADSL lines by different ISP for redundancy Well, that's not the question you asked. You specifically mentioned RJ11 connections, so one can only assume that was direct from the telephone line, no? I'd put the ADSL router into bridge mode to eliminate the issue of dual NAT. If that's not practical, you can always configure the channels of the Cisco router in the DMZ of each of the two ADSL routers. __________________ If TSF has helped you, Tell us about it! or Donate to help keep the site up! Microsoft MVP - Windows Desktop Experience