Date: Sat, 31 Oct 2009 01:22:37 +0100 From: Sebastian Hyrwall <sh@keff.org> To: Chuck Swiger <cswiger@mac.com> Cc: freebsd-net@freebsd.org Subject: Re: Hi. /31 on ethernet links Message-ID: <4AEB834D.1050907@keff.org> In-Reply-To: <18C758A7-1908-4D1A-BDCA-80FF7FD8BC22@mac.com> References: <4AEB7AE8.5090101@keff.org> <18C758A7-1908-4D1A-BDCA-80FF7FD8BC22@mac.com>
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Chuck Swiger skrev: > On Oct 30, 2009, at 4:46 PM, Sebastian Hyrwall wrote: >> Is there any way to use /31's on ordinary ethernet links in 7.2? >> "ifconfig addr dest-addr" does not work either. It keeps setting the >> last ip as broadcast. > > A /31 subnet is only defined for point-to-point network links, per: > > http://www.rfc-editor.org/rfc/rfc3021.txt > > Ordinary ethernet links have BROADCAST flag set instead of POINTOPOINT. > > Regards, Well how do I set the POINTOPOINT flag and remove the BROADCAST-flag on ethernet links? Or are you implying that it does not belong on ethernet links :) Cause Cisco and Linux support /31 (ptp's) on ordinary ethernet links. Sincerely, Sebastian H
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