On Sat, Oct 29, 2005 at 12:04:53AM +0900, SUZUKI Shinsuke wrote: > I tried the same test using my PC with fxp drivers, but your phenomena > did not happen in my environment (at least for five hours). > > Maybe the configured prefix was regarded as off-link by some reason. > (it is theoretically possible in IPv6, but I'm not sure whether it > really happens in your case)
I don't think this is the case, ndp looks normal: 2002:abcd:ef01:5555::/64 if=em1 flags=LO vltime=infinity, pltime=infinity, expire=Never, ref=0 No advertising router [ followed by a whole bunch of link local addresses from all my vlans on a different interface ] However, I think I've isolated the trigger. I noticed that on bootup, the route was _always_ missing. There was also duplicate ifconfig output -- once from rc.d/netif and once from devd upon getting "link up". Knowing that, I can cause it to happen on command by manually re-configuring an interface with an address it already has: With em1 up but not configured yet: # ifconfig em1 inet6 2002:abcd:ef01:5555::20 (routes are all normal) # ifconfig em1 inet6 2002:abcd:ef01:5555::20 (prefix route disappears) It's also been a lot more stable today than yesterday. However yesterday I was moving some cables around so there were lots of link down / up events. My guess is that devd was dutifully reconfiguring the interface on link up and causing the random drops. There is a slight delay between the second ifconfig and the route disappearing -- less than 0.5s. During that window I managed to capture the following seemingly inconsistent output fron ndp -p: 2002:abcd:ef01:5555::/64 if=em1 flags=LO vltime=infinity, pltime=infinity, expired, ref=0 No advertising router -- Craig _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "[EMAIL PROTECTED]"
