nanog mailing list archives

Re: IPv6 prefix lengths


From: Randy Carpenter <rcarpen () network1 net>
Date: Wed, 12 Jan 2011 23:02:33 -0500 (EST)


If you are going to have each site connected separately to the outside world, you will want a /48 for each site.

If you are going to aggregate them internally, you can use whatever you want, although you should be able to get a /48 
for each site anyway.

You don't want to announce anything longer than a /48 to the outside world.

-Randy

--
| Randy Carpenter
| Vice President - IT Services
| Red Hat Certified Engineer
| First Network Group, Inc.
| (800)578-6381, Opt. 1
----

----- Original Message -----
Hi all,

What IPv6 prefix lengths are people accepting in BGP from
peers/customers? My employer just got a /48 allocation from ARIN, and
we're trying to figure out how to support multiple end sites out of
this (probably around 10). I was thinking about assigning a /56 per
site, but looking at the BGP table stats on potaroo.net [1], it looks
like this is not too common (only .29% of prefixes). Thoughts?

Thanks,
--Richard


[1] <http://bgp.potaroo.net/v6/as2.0/index.html>


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