[147893] in North American Network Operators' Group
Re: subnet prefix length > 64 breaks IPv6?
daemon@ATHENA.MIT.EDU (sthaug@nethelp.no)
Sun Dec 25 05:27:05 2011
Date: Sun, 25 Dec 2011 11:26:08 +0100 (CET)
To: glen.kent@gmail.com
From: sthaug@nethelp.no
In-Reply-To: <CAPLq3UM+gKAv93efZ=_p3zd8vs87-wCytaMYUPaf6tvGxzksag@mail.gmail.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
> > prefixes on the same link. =A0Choosing to make use of a 120-bit pre=
fix
> > (for example) will do nothing to protect against a rogue RA announc=
ing
> > its own 64-bit prefix with the A flag set.
> >
> =
> I could not find any "A flag" in the RA. Am i missing something?
It's part of the Prefix Information option. See
http://tools.ietf.org/html/rfc4861#section-4.6.2
Steinar Haug, Nethelp consulting, sthaug@nethelp.no
