Are there any RFCs for address selection for IPv4
Poul-Henning Kamp
phk at phk.freebsd.dk
Mon Apr 26 15:12:42 UTC 2021
--------
Rodney W. Grimes writes:
> > It is OK to have a LL as next-hop.
> >
> > It is not OK to send a packet with dst=LL to any next-hop.
>
> No, that is explicity forbidden:
> RFC 3927 at 2.7 paragraph 2:
>
> An IPv4 packet whose source and/or destination address is in the
> 169.254/16 prefix MUST NOT be sent to any router for forwarding, and
> any network device receiving such a packet MUST NOT forward it,
> regardless of the TTL in the IPv4 header.
Right the second criteria should be:
It is not OK to send a packet with src=LL or dst=LL to any next-hop.
But it /is/ OK to have a next-hop router on a LL, but it is no use,
unless your host has another interface with a "real" IP on it.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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