nanog mailing list archives
Re: Which RFC?
From: Susan Roycroft <susanr () cisco com>
Date: Thu, 02 Jan 1997 12:10:36 -0500
also, 1058, rip RFC 'Entities that use RIP are assumed to use the most specific information available when routing a datagram.' susan Bill Woodcock wrote:
> Anyone know *which* RFC says a packets should be routed using > the most specific route in a routing table, not (for instance) > the first route in the table that matches, or, for instance, > using a less specific route that has a better metric? It might be worth your while to look through the sections of RFC 791 and subsequent revisions which define the second byte of the IP header, which sets the delivery-priority and the class-of-service for the packet. The class-of-service (type-of-service?) field lets you specify whether you want the shortest, largest, cheapest, or most reliable route, those being mutually exclusive. In my experience, both fields are set to 0 on just about all packets, which doesn't specify any requested class-of-service. That presumably leaves the router free to choose any route it likes, at its discretion. > This is so basic I hardly know where to find it If the router, in its discretion, chooses to route the packet in the wrong direction, that should be easily demonstrated and reasonably incontrovertable, no? What's your vendor's argument in favor of shipping the packet to a nearby site which isn't associated with your destination? I'm kind of curious to hear it... Who's the vendor? Please humiliate them publicly. :-) -Bill ______________________________________________________________________________ bill woodcock woody () zocalo net woody () nowhere loopback edu user () host domain com
-- ============================================================== Susan Roycroft (formerly Susan Holdridge) cisco Systems, Inc. Customer Engineering ccie# 2322 ============================================================== - - - - - - - - - - - - - - - - -
Current thread:
- Which RFC? Alex.Bligh (Jan 02)
- Re: Which RFC? Neil J. McRae (Jan 02)
- Re: Which RFC? Joe Rhett (Jan 02)
- <Possible follow-ups>
- Re: Which RFC? Bill Woodcock (Jan 02)
- Re: Which RFC? Alex.Bligh (Jan 02)
- Re: Which RFC? Susan Roycroft (Jan 02)
- Re: Which RFC? Paul G. Donner (Jan 02)
- Re: Which RFC? Kamau Wanguhu (Jan 02)