From: mcaplan.cs@xxxxxxxxxxxxxxx
Date: Tue Apr 17 2001 - 09:38:04 GMT-3
Hi,
Has anybody got any advice about the problem below. ie - why dont I see
evidence of poison reverse in RIP, RIP2 and IGRP. I thought split horizon
with poison reverse meant RIP would send out route updates out an interface
with a hop count of 16 if it learnt the route via that interface. But I dont
see it when I do a snoop or debug ip rip - I just see evidence of split
horizon ?
Thanks
Mark
> ----------
> From: mcaplan.cs@clearstream.com[SMTP:mcaplan.cs@clearstream.com]
> Reply To: mcaplan.cs@clearstream.com
> Sent: Dienstag, 17. April 2001 09:33
> To: ccielab@groupstudy.com
> Subject: RIP poison reverse
>
> Hi,
>
> I have been trying to see evidence of RIP's split horizon with poison
> reverse. I have the following set up
>
> subnet1 subnet2
> ----- -----
> | |
> R1 R2
> | |
> ------------------------------------------------------- subnet3
> |
> Solaris box
>
> Now when I run snoop on the Solaris box (or even debug ip rip from R1 and
> R2) I only see evidence of Split horizon. I see R2 advertise subnet 2 out
> onto subnet 3, and R1 advertise subnet 1 out onto subnet 3. I thought with
> poison reverse, R1 should advertise subnet 2 with a hop count of 16 out on
> subnet 3 interface, and R2 should advertise subnet 1 with a hop count of
> 16
> out on the subnet 3 interface. I dont see this poison reverse behavior on
> RIP, RIP2 or IGRP ? Can anyone explain. The only time I see any semblance
> of
> poison reverse, is when a router has purged a route, and it advertises it
> with a hop count of 16 until the flush timer expires.
>
> Any help is appreciated.
>
> Thanks
>
> Mark
>
>
>
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