Date: Tue, 03 Jan 2012 18:07:10 +0000 From: Matthew Seaman <m.seaman@infracaninophile.co.uk> To: freebsd-hackers@freebsd.org Subject: Re: [ANN] host-setup 4.0 released Message-ID: <4F0343CE.2080500@infracaninophile.co.uk> In-Reply-To: <CAGH67wS7QuqXXAa22yP%2BawDR52yLPBzfvRC3_=_mGR3DtGA2eQ@mail.gmail.com> References: <04a201ccca33$fe6115a0$fb2340e0$@fisglobal.com> <2092634439.782373.1325609539518.JavaMail.root@erie.cs.uoguelph.ca> <CAGH67wS7QuqXXAa22yP%2BawDR52yLPBzfvRC3_=_mGR3DtGA2eQ@mail.gmail.com>
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On 03/01/2012 17:59, Garrett Cooper wrote:
> 4. Prefixing the IPv6 address with fe80: generally means it's an IPv4
> -> IPv6 address (IIRC).
Nope. That's a link-local address. Any NIC can configure itself with
and address using that prefix and a host part generated from the MAC
address completely automatically, and thus communicate on any locally
attached network. (See RFC 5156 for the gory details.)
IPv4 mapped addresses are like this:
::ffff:192.0.2.0
(or you can express the 32 bits of the IPv4 address as two
colon-separated hex strings in the usual IPv6 idiom.)
Cheers,
Matthew
--=20
Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard
Flat 3
PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate
JID: matthew@infracaninophile.co.uk Kent, CT11 9PW
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