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Date:      Sat, 31 Oct 2009 18:56:42 +0900
From:      Randy Bush <randy@psg.com>
To:        sthaug@nethelp.no
Cc:        freebsd-net@freebsd.org
Subject:   Re: Hi. /31 on ethernet links
Message-ID:  <m2iqdvzy1x.wl%randy@psg.com>
In-Reply-To: <20091031.090152.74670981.sthaug@nethelp.no>
References:  <4AEB7AE8.5090101@keff.org> <18C758A7-1908-4D1A-BDCA-80FF7FD8BC22@mac.com> <4AEB834D.1050907@keff.org> <20091031.090152.74670981.sthaug@nethelp.no>

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> No, Cisco does not *support* it. They make it available, which is a
> completely different story.
> 
> We have asked Cisco repeatedly, through official channels, whether
> they *support* /31 on Ethernet links. The answer is always that it
> *may* work, use at your own peril.

i have managed O(10^3) ciscos in isp backbone(s).  /31s predominate for
ether links in that space.  though i suspect there is more multipoint in
the enterprise space.

we need to be able to use /31s and /127s on freebsd if it is to be used
in the routing space.

randy



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