nanog mailing list archives
Re: Cogent IPv6
From: Chris Adams <cmadams () hiwaay net>
Date: Wed, 8 Jun 2011 22:33:29 -0500
Once upon a time, William Herrin <bill () herrin us> said:
Now, as to why they'd choose a /112 (65k addresses) for the interface between customer and ISP, that's a complete mystery to me.
I had to ask this here a while back, so I can now share. :-) IPv6 addresses are written as 8 16-bit chunk separated by colons (optionally with the longest consecutive set of :0 sections replaced with ::). A /112 means the prefix is 7 of the 8 chunks, which means you can use ::1 and ::2 for every connection. Of course, just because you allocate a /112 (or shorter) in your database doesn't mean you have to use it. You could also allocate a /112 for a point-to-point link and use a /127 (e.g. addresses ::a and ::b). -- Chris Adams <cmadams () hiwaay net> Systems and Network Administrator - HiWAAY Internet Services I don't speak for anybody but myself - that's enough trouble.
Current thread:
- Cogent IPv6 Nick Olsen (Jun 08)
- Re: Cogent IPv6 Mark Radabaugh (Jun 08)
- Re: Cogent IPv6 Martin Millnert (Jun 08)
- Re: Cogent IPv6 ryan (Jun 08)
- Re: Cogent IPv6 Owen DeLong (Jun 08)
- RE: Cogent IPv6 Kelly Setzer (Jun 08)
- Re: Cogent IPv6 William Herrin (Jun 08)
- Re: Cogent IPv6 Chris Adams (Jun 08)
- Re: Cogent IPv6 Aftab Siddiqui (Jun 08)
- Re: Cogent IPv6 Jack Bates (Jun 09)
- Re: Cogent IPv6 William Herrin (Jun 09)
- Re: Cogent IPv6 Jack Bates (Jun 09)
- Re: Cogent IPv6 Joel Jaeggli (Jun 09)
- RE: Cogent IPv6 George Bonser (Jun 09)
- Re: Cogent IPv6 Chuck Anderson (Jun 09)
- Re: Cogent IPv6 Rob Evans (Jun 09)
- Re: Cogent IPv6 Grzegorz Janoszka (Jun 09)
- Re: Cogent IPv6 sthaug (Jun 09)