How do I configure two leased lines in one router?

Our routing and switching expert explains how to configure two leased lines in one router, in this Ask the Expert answer.

Sudhanshu Gupta

How do I configure two Internet leased lines in one router? If one line is down, the second can provide the connectivity. I have a Cisco router 1760.

The easiest way is to configure one floating static route so that the link becomes active in case the first link...

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fails:

Ip route 0.0.0.0 0.0.0.0 ISP_A
Ip route 0.0.0.0 0.0.0. ISP_B 50

Traffic will go to the ISP B only when the ISP A link is down. The drawback in this case is that you would be using only one link.

Another way is to have routing protocol and BGP so that you can utilize both the links almost 50% for the traffic going out of your network.

This was last published in April 2008

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Leecheng - 21 Jun 2017 12:31 AM

I have one issue i perform configure, please suggestion me
now i have one lease line from ISP to HQ and Branch A already, but now i am install one backup lease line point to point from HQ to Branch A, so i need configure both these line in one Cisco Router 3925

My aim is to have a backup line so that when main line goes down, the traffic should go through backup leased line.

please suggestion me
thanks an advance

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