[165884] in North American Network Operators' Group
Re: minimum IPv6 announcement size
daemon@ATHENA.MIT.EDU (William Herrin)
Tue Sep 24 14:34:12 2013
In-Reply-To: <5241986D.60902@stluke.com.ph>
From: William Herrin <bill@herrin.us>
Date: Tue, 24 Sep 2013 14:33:41 -0400
To: "Nathanael C. Cariaga" <nccariaga@stluke.com.ph>
Cc: NANOG Mailing List <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Tue, Sep 24, 2013 at 9:49 AM, Nathanael C. Cariaga
<nccariaga@stluke.com.ph> wrote:
> I've been Google-ing about if there is such a standard that sets the minimum
> IPv6 advertisement on BGP. My concern is that I am running a network that
> is operating on multiple sites and currently rolling out our IPv6 on the
> perimeter level. Having to get our /48 allocation from our RIR, I figured
> out I would it would be best for us to break down the /48 into smaller
> chunks (i.e /56s) and farm it out to our sites since a single /48 will be
> very big for our single site.
Hi Nathanael,
Many if not most networks set a limit at /48. Verizon was the last
player of consequence to filter at /32, and they moved to /48 a couple
years ago. A few also try to limit advertisements within ISP space
nearer to /32. Usually not at /32, but a /48 announcement within space
allocated to an ISP won't necessarily be honored.
If you have distinct networks with distinct routing policies (or can
make a reasonable claim to such) and your RIR is ARIN, you can request
a block size large enough to provide a /48 to each distinct network. A
/44 or whatever. Search through the ARIN NRPM for details. I don't
know about the other RIRs; someone in your region (Asia Pacific?) will
know.
Regards,
Bill Herrin
--
William D. Herrin ................ herrin@dirtside.com bill@herrin.us
3005 Crane Dr. ...................... Web: <http://bill.herrin.us/>
Falls Church, VA 22042-3004
