nanog mailing list archives
Re: ISP customer assignments
From: Michael Dillon <wavetossed () googlemail com>
Date: Fri, 16 Oct 2009 00:51:21 +0100
Of course, with IPv4, you never assigned a large enough block to begin with that would anticipate all growth, so routing additional blocks was a lot easier than changing blocks, cleaner than secondary IPs multiplying like crazy, etc., etc. None of that would be an issue with a single /64.
You've hit on the key difference of IPv6. With IPv6 you should design your network so that it can grow for a long time without increasing the address block sizes anywhere. A /64 will work for even the biggest subnets. A /48 will do for for very, very big sites. And only the largest ISPs will outgrow a /32 allocation. If you assign a /48 to a data center site, then when you subnet it, try to maintain that growth ability if you can. Don't skimp on address block sizes unless you are backed into a corner for technical or business reasons. --Michael Dillon
Current thread:
- Re: ISP customer assignments, (continued)
- Re: ISP customer assignments Cord MacLeod (Oct 13)
- Re: ISP customer assignments James Hess (Oct 13)
- Re: ISP customer assignments Kevin Loch (Oct 13)
- Re: ISP customer assignments Leo Bicknell (Oct 13)
- Re: ISP customer assignments Chris Adams (Oct 13)
- Re: ISP customer assignments Leo Bicknell (Oct 13)
- RE: ISP customer assignments TJ (Oct 13)
- Re: ISP customer assignments Nathan Ward (Oct 13)
- Re: ISP customer assignments Chris Adams (Oct 13)
- Re: ISP customer assignments Nathan Ward (Oct 13)
- Re: ISP customer assignments Michael Dillon (Oct 15)
- Re: ISP customer assignments Chris Adams (Oct 15)
- Re: ISP customer assignments Nathan Ward (Oct 15)
- Re: ISP customer assignments Dave Temkin (Oct 15)
- Re: ISP customer assignments Rob Evans (Oct 16)
- Re: ISP customer assignments William Herrin (Oct 15)
- Re: ISP customer assignments Tore Anderson (Oct 16)
- RE: ISP customer assignments Wouter de Jong (Oct 14)
- Re: ISP customer assignments Joel Jaeggli (Oct 13)
- Re: ISP customer assignments Justin Shore (Oct 13)
- Re: ISP customer assignments Michael Dillon (Oct 13)