Re: RIP V1 Update recieved as /32 (host bit set )

From: Sathesh (satheshkumar@gmail.com)
Date: Tue Sep 23 2008 - 02:06:57 ART

Hi Peter,

Yes, you are right. RIP willn't accept the packet if the source of the
packet is different from the same subnet. I tried the lab with VLSM
technique in RIPv1, as we know it wont work.

But when I tried with different mask (10.1.1.1/24 in R1 and 10.1.1.2/16 in
R2) for the same major network connected directly through framerelay, I
found the router with less subnetmask (10.1.1.2/16 in R2) update its routing
table by /32 mask for the RIP updates (Major network as 10.0.0.0) recieved from
the other R1 Router.

For more information on this RIP update, kindly have a look at the "*Receive
Updates*" section in the following document:
http://www.cisco.com/en/US/tech/tk364/technologies_tech_note09186a0080093fd8.shtml

It is an interesting article.
Thanks
Sathesh
On Tue, Sep 23, 2008 at 1:03 AM, Peter Wolter <
Peter.Wolter@foremostfarms.com> wrote:

> Hi Sathesh,
> RIP in only accept packet when the source of packet is same subnet with
> received interface.
> If the source of packet is not same subnet with received interface, you
> need
> command: *no validate-update-source*
> More reference:
>
> http://www.cisco.com/en/US/docs/ios/iproute/command/reference/irp_rip.html#wp1012874
> Regards,
> Butnguyen
>
>
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-- 
Regards,
Sathesh Kumar

Blogs and organic groups at http://www.ccie.net

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