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IP Route

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by dilligaffer

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I just received instruction for our Internet Failover. We currently run 2 routers and for the 1st I have instructions "no ip route 10.10.10.1 3" my only confusion is what is the "3" referencing? Is this dealing with load balancing?
Any information is much appreciated.

5 replies

by joseph moore

That is weird, AFAIK.
Here is a link to the IP ROUTE syntax for a Cisco IOS router:
http://tinyurl.com/2qmmx

Normally, it would be NO IP ROUTE, then the IP, and then the subnet mask, and THEN possibly a gateway, THEN the distance. The gateway is, apparently, optional (I don't know WHY the gateway would be optional, but I am also not a hard-core Cisco guy!).

So, it looks like they just forgot to put in the subnet mask in what they sent you. The "3" is the distance. So, if you have a Class A address space (and since it is 10.10.10.1 then that sure sounds like Class A), I think the command should really be:
NO IP ROUTE 10.10.10.1 255.0.0.0 3

hope this helps

by dilligaffer

Actually I may have confused you it does read as follows: no ip route 0.0.0.0 0.0.0.0 10.10.10.1 3 - now someone suggested cost metric but I don't think this is the case.

by james.longson

The 3 is the metric. The cost of the route. Say you are running EIGRP. EIGRP has a metric of 90. A static route has a metric of 1. Therefore the static route will have a higher prority than EIGRP. Normally you you set the static route with a metric of 250. The static route will be used as a last resort option if EIGRP fails. You have to enable IP classes as well.

Hope this helps

by dilligaffer

Thank you so much - I did find information on cost metric so I was on the right track - however your explaination is much easier to follow! Poster rated this answer.

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