On 10/31/11 05:59 , Owen DeLong wrote:
Ideally, you should put a /48 at each location.
Owen
On Oct 31, 2011, at 12:56 AM, Dmitry Cherkasov wrote:
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 ISP so /48 looks quite reasonable and sufficient for all our needs.
It's not because it can't be de-aggregated further in general. if you have 5 discreet site you really need at /45. if you can tthe announcements of the regions to something less specific than a /48 e.g. a /46 then by all means do so.
Thank you.
Dmitry Cherkasov