using IPv6 address block across multiple locations

Randy Carpenter rcarpen at
Mon Oct 31 11:52:22 UTC 2011

Not sure about RIPE, but under ARIN, you would qualify for a /44 (or larger if you have more than 12 sites), out of which you could announce the /48s independently and as an aggregate, as you wish to do.


----- Original Message -----
> Hello,
> Please advice what is the best practice to use IPv6 address block
> across distributed locations.
> Recently we obtained our PI /48 from RIPE. The idea was to assign
> partial slices from this block to different locations (we have
> currently 3 offices in Europe and 2 in USA). All locations are
> interconnected with static VPNs. Each location is supposed to
> establish BGP session with local ISP. Partial prefix /56 + aggregate
> /48 (with long AS PATH) are to be announced by each office.
> The problem we ran across is that ISP in US does not wish to accept
> prefixes longer then /48 from us.
> Need your advice: is this normal to distribute /48 by /56 parts
> across
> locations or should we obtain separate /48 for each of them? Or maybe
> we need /32 that can be split into multiple /48? Anyway we are not
> so /48 looks quite reasonable and sufficient for all our needs.
> Thank you.
> Dmitry Cherkasov

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