Re: draft-baker-6man-multiprefix-default-route-00.txt is a newdraft
Pekka Savola <pekkas@netcore.fi> Tue, 13 November 2007 05:27 UTC
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Date: Tue, 13 Nov 2007 07:27:00 +0200
From: Pekka Savola <pekkas@netcore.fi>
To: Havard Eidnes <he@uninett.no>
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References: <6A990F09-F0D4-43AA-BA1F-D81AB94628D6@cisco.com> <55C1E39E-7FE1-4912-B730-017C1C5CAC09@it.uc3m.es> <A4AE6069-5936-4C7E-AFD6-6100FB66A8EE@cisco.com> <20071112.172700.95023288.he@uninett.no>
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Cc: marcelo@it.uc3m.es, ipv6@ietf.org, fred@cisco.com
Subject: Re: draft-baker-6man-multiprefix-default-route-00.txt is a newdraft
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On Mon, 12 Nov 2007, Havard Eidnes wrote: > Instead, my inclination would be to "solve" this problem in a > much simpler manner, simply by declaring it a configuration > error. A site which receives prefixes from more than a single > provider is clearly multihomed, and needs to have its providers > make appropriate exceptions to a strict "I will only accept > packets with source addresses from within the prefix I delegate" > rule. Who's watching the watchers? An architecture where you depend on the first hop ISP to do filtering and you cannot check that it has been done further down the network doesn't do enough to keep ISPs "honest". Either that, or the domain in question needs to ensure via > a combination of address selection and routing policy that one > avoids being subjected to (presumably unwanted) RPF failures. I think Fred's solution is proposing a solution in (mostly) simpler scenarios which are typically unmanaged. A default policy, if such could be created, shipping in smaller routers could fulfill this goal. -- Pekka Savola "You each name yourselves king, yet the Netcore Oy kingdom bleeds." Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
- Fwd: draft-baker-6man-multiprefix-default-route-0… Fred Baker
- Re: draft-baker-6man-multiprefix-default-route-00… marcelo bagnulo braun
- Re: draft-baker-6man-multiprefix-default-route-00… Fred Baker
- Re: draft-baker-6man-multiprefix-default-route-00… marcelo bagnulo braun
- Re: draft-baker-6man-multiprefix-default-route-00… Havard Eidnes
- Re: draft-baker-6man-multiprefix-default-route-00… marcelo bagnulo braun
- RE: draft-baker-6man-multiprefix-default-route-00… Manfredi, Albert E
- Re: draft-baker-6man-multiprefix-default-route-00… Fred Baker
- Re: draft-baker-6man-multiprefix-default-route-00… Pekka Savola
- Re: draft-baker-6man-multiprefix-default-route-00… marcelo bagnulo braun
- RE: draft-baker-6man-multiprefix-default-route-00… James Carlson
- RE: draft-baker-6man-multiprefix-default-route-00… Manfredi, Albert E
- RE: draft-baker-6man-multiprefix-default-route-00… James Carlson
- Re: draft-baker-6man-multiprefix-default-route-00… Iljitsch van Beijnum
- Re: draft-baker-6man-multiprefix-default-route-00… James Carlson
- Re: Fwd: draft-baker-6man-multiprefix-default-rou… Brian E Carpenter