The Routing Over Large Clouds Mailing List Archive by date

[gardo@vnet.ibm.com]

>Folks,
>
>Can a Purge message carry optional extensions, and specifically the
>Destination Mask extension ? If not, then how one could purge a shortcut
>to an address prefix ?
>
>Yakov.

I thought the following change was going to be added to the draft so
that the mask could be sent in a Purge, but I do not see the
text that Jim proposed in the latest draft (see Jim's comments below):

James Luciani wrote:
>To: shur@arch4.ho.att.com
>Subject: Re: Purge packet
>In-reply-to: Your message of "Mon, 16 Oct 1995 09:23:41 EDT."
>             <9510161323.AA18375@dahlia.ho.att.com>
>cc: rolc@nexen.com
>Date: Wed, 18 Oct 1995 16:24:56 -0400
>From: James Luciani <luciani@nexen.com>
>Sender: owner-rolc@nexen.com
>[...]
>Also, the Destination Prefix Extension as of V4 (and alpha v5) can
>only be in the request and reply packets, (read it closely :-( ), so
>we need to change that if we go down this path.  Also, we do not want
>the prefix as part of the purge packet per se because we want to move
>toward a multiprotocol internetworking layer version of NHRP (i.e.,
>NHRP for MPON (my new acronym for Multi-Protocol Over NBMA :-) )) and
>the internetworking protocol layer address length will be different
>from protocol to protocol which argues for a varying length field.  We
>also probably don't want to complicate minimum functionality clients
>and servers (you'll note that the prefix extension is a
>"discretionary" extention) so having the prefix as part of the packet
>per se is less desirable.
>
>An example of new text for the extension follows:
>
>5.7.1  Destination Prefix Extension (IPv4-Specific)
>
>  Discretionary = 1
>  Type = 1
>  Length = 1
>
>  This extension is used to indicate that the information carried in an
>  NHRP Reply/Purge pertains to an equivalence class of internetwork layer destination
>  addresses rather than just the internetwork layer destination address
>  specified in the request.
>
>etc...
>
>
>Regards,
>-- Jim Luciani
>__________________________________________________________________________
>James V. Luciani    Ascom Nexion                    voice: +1 508 266-3450
>luciani@nexen.com   289 Great Rd., Acton MA 01720   FAX: +1 508 266-2300

-- Russell