Q

How can I configure my router so that if one of my two DSL lines goes down, the other line will take

I have two DSL lines and one Cisco router with two Ethernet interfaces. How can I configure the router so that

if one of the lines goes down, the other will take over? There are a few different ways to handle this.

One option you have is to create a floating static route for the same destination with a higher metric. For example:

Ip route 192.168.10.0 255.255.255.0 eth0
Ip route 192.168.10.0 255.255.255.0 eth1 50

The second serves as a floating static route and will be activated only if eth0 goes down.

Another solution is to use a backup interface command under eth0. (i.e. "backup interface eth1"). It will then activate if eth0 goes down.

Another option is to use a dynamic routing protocol. However, this can only be done if your DSL service provider agrees to it.

This was first published in June 2004

Dig deeper on Network Hardware

Pro+

Features

Enjoy the benefits of Pro+ membership, learn more and join.

Have a question for an expert?

Please add a title for your question

Get answers from a TechTarget expert on whatever's puzzling you.

You will be able to add details on the next page.

0 comments

Oldest 

Forgot Password?

No problem! Submit your e-mail address below. We'll send you an email containing your password.

Your password has been sent to:

SearchSDN

SearchEnterpriseWAN

SearchUnifiedCommunications

SearchMobileComputing

SearchDataCenter

SearchITChannel

Close