Re: [v6ops] [homenet] Tsinghua work on source/destination routing

神明達哉 <jinmei@wide.ad.jp> Thu, 07 November 2013 18:43 UTC

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From: 神明達哉 <jinmei@wide.ad.jp>
To: Jen Linkova <furry13@gmail.com>
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Subject: Re: [v6ops] [homenet] Tsinghua work on source/destination routing
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At Thu, 7 Nov 2013 17:58:56 +0100,
Jen Linkova <furry13@gmail.com> wrote:

> Looks like we (finally) have a chance to enforce the requirement from
> RFC4007, Section9:
>
> "If transmitting the packet on the chosen next-hop interface
> would cause the packet to leave the zone of the source
> address, i.e.,
> cross a zone boundary of the scope of the
> source address, then the packet is discarded. "
>
> I'm seeing plenty of packets from link-local sources to global
> destinations which means that:
> 1) there are hosts with broken default address selection
> AND

(Probably an off-topic in this context but) this is not necessarily
accurate.  If a host only has a link-local address but somehow knows
the interface to send packets to a global destination, it would be
able to send packets with source being link-local and destination
being global, and validly (not breaking RFC 6724) so.  I believe it's
more likely to be a broken network configuration than a broken host
implementation.

--
JINMEI, Tatuya