Interesting thread. I think this sort of configuration should not be done
without considering the following IOS commands:
ip routing
ip default-gateway
ip irdp
ip proxy-arp
Different combinations of the above would assist in achieving the goal
?????. Not sure what the question on the test indicated, but many have shown
that it is possible to do the default route to almost anywhere. Problems do
arise depending on the scenario. The absence/presence of the above commands
help to alleviate some of the arp problems.
Winston.
-----Original Message-----
From: Tom Pruneau [mailto:[EMAIL PROTECTED]]
Sent: Friday, December 29, 2000 8:07 AM
To: Stull, Cory; '[EMAIL PROTECTED]'
Subject: Re: ip route question
I think it will work, but I suspect there is a caveat.
Think about it,
Lets say your ethernet 0 interface is 1.1.1.1 /24
and you have a default route ip route 0.0.0.0 0.0.0.0 ethernet 0
then lets say my router receives a packet destined for an IP address it
doesn't otherwise know a route to,
let's say 10.10.10.10
how could that work?
How would it know which device (assuming there are multiple devices) on the
ethernet to send the packet to?
With that default router I am assuming that you would have to arp for the
mac address associated with 10.10.10.10
If a device on the ethernet knew a route to 10.10.10.10, and it had proxy
arp enabled, then it could respond to the arp and the packet would be sent
to it. Proxy arp is usually on by default on a per interface basis on
ciscos.
You can see if proxy arp is on by doing a show ip interface e0 (or whatever
number interface you're dealing with)
But I'd bet if you had proxy arp turned off it would not work!
Tom
At 11:31 AM 12/29/2000 -0600, Stull, Cory wrote:
>
>I know I'm showing my ignorance here but I'm tired of trying to find the
>answer on CCO. Must be looking in the wrong places.
>
>
>I just saw a Boson question asking about ip route 0.0.0.0 0.0.0.0 int
>ethernet0
>
>
>I thought you could only point static routes like that out of point to
point
>interfaces? For example: ip route 0.0.0.0 0.0.0.0 int ser0
>
>
>
>
>
>
>
>Cory
>
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>
Tom Pruneau
Trainer Network Operations
GENUITY
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