Marco, Thank you very much for you quick answer. I indeed had the feeling it was not really useful anymore (as the group demotion system is taking care of it) and probably deprecated. I guess I should have checked the latest man page :)
Regards, William 2010/4/13 Marco Pfatschbacher <m...@mailq.de>: > On Tue, Apr 13, 2010 at 04:32:12PM +0900, william dunand wrote: >> Dear list, >> >> I am currently setting up two 4.6 boxed to act as carp'ed firewalls. > > [...] > >> Even though I got to quite satisfying results, I am confused about the >> net.inet.carp.preempt definition given in the carp(4) man page: >> >> a) Allow virtual hosts to preempt each other. >> >> b) It is also used to failover carp interfaces >> as a group. When the option is enabled and >> one of the carp enabled physical interfaces >> goes down, advskew is changed to 240 on all >> carp interfaces. See also the first example. >> Disabled by default. >> >> I have no problem to observe [a], but I really can't manage to make [b] happens. >> >> So when one of my interfaces goes down, all carp interfaces are >> failing over to the other node but it seems to be thanks to the >> demotion of "carp" group. A you can see below, advskew on the other >> hand does not change at all: > > [...] > >> Would anyone be so kind as to explain me what I am misunderstanding here ? > > Hi, > > the advskew bump to 240 is done internally and not visible with > ifconfig. Run tcpdump(8) and you'll see it on the wire. > > However, the 240 bump has been deprecated with 4.7 and the current manpage > doesn't mention it either :) > > Marco
