Hi Francis, Am Do, den 30.09.2004 schrieb Francis Dupont um 15:02: > In your previous mail you wrote: > > after we experimented a lot with (especially short) lifetimes on various > > => short prefix lifetimes are not the common case: prefix lifetimes > are at least in months and are announced in days. And don't forget > the 2 hour rule.
I agree that in the common case there are no 'short' lifetimes, but I wouldn't call it "months" (default is 7 days for preferred and 30 days for valid). Especially I doubt that RAs are "announced in days" by default. Still there are circumstances when short lifetimes are necessary, e.g. during a renumbering event or when abusing RAs for router redundancy. This all is not my point. My point is, that an interface doesn't try to reconfigure itself when it loses its address. > > platforms and tested renumbering procedures, I have an urgent question. > > Shouldn't a client react when its valid lifetime times out and the > interface loses the address? > > => no but it can react to the lost of all default routers (default > lifetime is 600 seconds, maximum is 1800 seconds). I agree, that might also be possible. But a quick check showed that neither Linux, BSD nor Windows hosts send RSs' upon Router Lifetime timeout either. But this advise is also lacking in RFC2462. If I searched it correctly, the RFC does not talk about Router Lifetime at all. And still, when the prefix' valid lifetime is shorter than the Router Lifetime (Maximum is 18.2 hours? 16bit?), there are times when the interface is lacking a global address. Christian -- JOIN - IPv6 reference center Christian Schild A WWU project Westfaelische Wilhelms-Universitaet Muenster http://www.join.uni-muenster.de Zentrum fuer Informationsverarbeitung Team: [EMAIL PROTECTED] Roentgenstrasse 9-13 Priv: [EMAIL PROTECTED] D-48149 Muenster / Germany GPG-/PGP-Key-ID: 6EBFA081 Fon: +49 251 83 31638, fax: +49 251 83 31653 -------------------------------------------------------------------- IETF IPv6 working group mailing list [EMAIL PROTECTED] Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
