Re: router-to-router NHRP (moderately long)

shur@arch4.ho.att.com Tue, 03 October 1995 15:19 UTC

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To: rolc@nexen.com, yakov@cisco.com
Subject: Re: router-to-router NHRP (moderately long)
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Yakov,

> From nexen.com!owner-rolc@ig1.att.att.com  Mon Oct  2 00:58:53 1995
> To: rolc@nexen.com
> Subject: router-to-router NHRP (moderately long)
> Date: Sun, 01 Oct 95 21:29:07 PDT
> From: Yakov Rekhter <yakov@cisco.com>
> Sender: owner-rolc@nexen.com
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> 
> Folks,
> 
> Appended is a proposal on how to provide shortcuts among routers.
> Please comment.
> 
> Yakov.
> --------------------------------cut here--------------------------
> Router-to-router (R2R) NHRP
> 
> To simplify the solution for the R2R NHRP case we constrain the problem by
> only allowing shortcuts within a single routing domain. If a path spans
> multiple routing domains (all on a common NBMA network), then the
> shortcuts will be established within each such domain. However, at the
> domains boundaries forwarding will be provided via IP routers, so that
> the path across the NBMA network will have more than one IP hop.
> 
(rest of message deleted).

This is a much simplified problem-scope as compared to your earlier
proposals.  Are the earlier proposals no longer under consideration? If
so, an explanation would be helpful.


Also I did not see any discussion of how loop free cut-through paths are
guaranteed. I think that also would be helpful to the group.

Thanks,
David.