In message <[email protected]>, Iljitsch van Beijnum writes: > On 20 sep 2011, at 9:58, [email protected] wrote: > > > For pt2pt SDH links you want /127 to avoid the ping-pong problem, > > not /126. > > That's nice (as long as your routers ignore the all zeros anycast address), > but the question wa > s: how do we write down IPv6 prefixes? Are we ok with simply leaving off the > undefined part, or > do we insist on proper inclusion of the zeros? If the former, how do we > avoid ambiguity for pr > efixes such as ::ffff/96?
Always specify all 128 bits. Most of the time the minimal representation will end in :: occasionally it won't. For the prefix in question the preferred representation is "::ffff:0.0.0.0/96" but "::ffff:0:0/96". > -------------------------------------------------------------------- > IETF IPv6 working group mailing list > [email protected] > Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 > -------------------------------------------------------------------- -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: [email protected] -------------------------------------------------------------------- IETF IPv6 working group mailing list [email protected] Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
