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I'm trying to set up a backup route for my network as a safety net when the primary link fails; by adjusting the administrative distance with the ip route command. I have one router (cisco 1900 series) and two modems. My issue is i don't really understand how to set the parameters for this command. I've learnt the commands i'll use for this are:

For primary network (use default route)

ip route <network> <subnet> <ip address of main ISP modem>

For back up network (set admin distance)

ip route <network> <subnet> <ip address of backup ISP modem> 100

So my question: Is the network parameter supposed to be the IP address of the router? and the ip address parameter (which comes after subnet) the IP of the modem??

ss_millionaire
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1 Answers1

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In short, yes.

In long, the command of For primary network (use default route) is adding the default route to the highest priority in the routing table. So every traffic will route on that route.

And the second command For back up network (set admin distance) is adding a route with AD 100, assume you only have this two route on the routing table, basically this route will never have traffic unless you modify the For primary network (use default route) AD to 101 or larger.

Bilo
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  • Thanks for the response. So you're saying if my router has an ip of **192.168.1.1** i would use this for the network parameter and not **192.168.1.0**? – ss_millionaire Jun 23 '15 at 16:38
  • the usage of `ip route` is `ip route [unknown network] [which device should l look for]`, assume your **ip address of main ISP modem** is 123.123.123.123 and your **ip address of backup ISP modem** is 234.234.234.234, so **For primary network** `ip route 0.0.0.0 0.0.0.0 123.123.123.123` and for **For back up network** is `ip route 0.0.0.0 0.0.0.0 234.234.234.234 100` – Bilo Jun 24 '15 at 02:46