Please have a look at the router that says it's routing to null0.
Chances are the netmask is shorter than your directly connected ethernet
so that when the ethernet route 'disapears' this route become active.
As to why the ethernet route disapears thats another question.
Does a show interface show many interface resets?
Darren
On Wed, 9 Feb 2000, Patrick Murphy wrote:
>
>
> I had a problem today with a router that lost it's ability to route?? We run
> EIGRP on a couple of thousand routers around the world but my router in
> another location seems to lose the route to it's internal ethernet
> interface.
>
> Suddenly the people on the ether side of the router can't route out and
> people on the outside can't route in. The serial side is fine, no problems
> telnetting in from there.
>
> When I do a ping I often seem to get an advertizment from another router
> that claims to own the route, when I check the suspect route it claims to
> have a directly connected route and it points to the NULL0.
>
> Can someone tell me how to stop this, I happened 5 times today. I just
> reload the router and I seems to come back. It's becoming very annoying...
>
> Patrick Murphy
>
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