From: Rick Burts (burts@xxxxxxxx)
Date: Wed Mar 01 2000 - 14:27:22 GMT-3
Jason
Yes it is normal. OSPF routers compare addresses in the hello packet
and need to be on the same subnet.
It will work and form adjacencies if you change the fourth router and
make its primary address in the same subnet as the other routers and
put the other address as secondary. I dont know of a way to get it
to work without changing the primary/secondary.
Normal practice for secondary addressing is for all routers on the
link to use the same subnet as primary. Having one router on the same
link but declaring a different primary subnet is at some level a
misconfiguration of the router.
Rick
On Wed, 1 Mar 2000, Jason T. Rohm wrote:
> I think I know the answer, but I am hoping that someone can confirm this
> for me.
>
> I have four routers on an ethernet segment. They are all part of area 0.
> The fourth router refuses to form adjacencies with the other three. This
> fourth router has an IP address that is from a different range, but has a
> secondary address that is on the same subnet as the other three.
>
> If I debug ip ospf events, I get a message that the hello packets are from
> the wrong address.
>
> Is this normal? Is there a way to make the fourth OSPF router join the area
> w/out swapping the primary and secondary addresses?
>
> -Jason T. Rohm
> jtrohm@athenet.net
>
>
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