From: Patrick McKinnis (pmckinni@xxxxxxxxx)
Date: Wed Mar 01 2000 - 14:31:58 GMT-3
Secondary addresses can be problematic in production environments that use
dynamic routing protocols.
Only the first IP address for each classful network is used for the source
address of the routing updates/lsa's/hello's. Therefore, the router (&
interface) that you have with a different address order is sending routing
updates/lsa's/hello's across the same wire, but a different subnet.
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> Jason T. Rohm
> Sent: Wednesday, March 01, 2000 10:47 AM
> To: Ccielab (E-mail)
> Subject: OSPF and Secondary Addresses
>
>
> 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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