In a message written on Fri, Nov 19, 2004 at 05:15:26PM +0100, Lars Erik Gullerud wrote: > While that would seem logical for most engineers, used to /30 or /31 ptp > links in IPv4 (myself included), that does not in fact seem to be the > way things are currently done in IPv6, unless something changed (again) > while I wasn't paying attention... /64 is the minimum subnet size, even > for ptp-links - there was even an RFC published relating to the use of > /127's (or, should I say, the recommendation to "don't to that"), namely > RFC3627 (aka "Use of /127 Prefix Length Between Routers Considered > Harmful"). But, you can still get 65536 ptp links out of a single /48 of > course.
FWIW, my test networks have always been configured with /126's, and
have never had an issue.
With the exception of auto-configuration, I have yet to see any
IPv6 gear that cares about prefix length. Configuring a /1 to a
/128 seems to work just fine. If anyone knows of gear imposing
narrower limits on what can be configured I'd be facinated to know
about them.
--
Leo Bicknell - [EMAIL PROTECTED] - CCIE 3440
PGP keys at http://www.ufp.org/~bicknell/
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