From: Brian (shotcaller30@xxxxxxxxxxx)
Date: Thu Nov 16 2000 - 14:09:57 GMT-3
Thanks for the advice Bert.
Would the same problem apply to GRE tunnels? I put cable ranges and zones
on the tunnels and changed them to GRE IP tunnels with RTMP across them and
'split-horizon like' issues are still happening.
----- Original Message -----
From: Bert Kellerman <bertke@charter.net>
To: Simon Baxter <Simon.Baxter@au.logical.com>
Cc: Brian <shotcaller30@hotmail.com>; cciemail <ccielab@groupstudy.com>
Sent: Friday, November 17, 2000 3:21 AM
Subject: Re: Appletalk tunnels
> I recreated this problem, did some research, and this is what I found.
>
> The RFC on AURP(1504) states this:
>
> "An exterior router connected to multiple tunnels functions logically as
> though it were two or more exterior routers connected to the same
> AppleTalk network, with each exterior router connected to a different
> tunnel."
>
> So this IS a split horizon issue...a router will not advertise Exterior
> Routes it learns on one tunnel out the other tunnel. It views the AURP
> tunnels as the same network.
>
>
> The solution:
>
> Full AURP Tunnel Mesh
>
> Create a tunnel on each spoke pointing to the other spoke. After
> implementing this spoke to spoke route table convergence was achieved.
>
> --
> Bert
> (RTP on 11/29)
>
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