7.0 loosing IPV6 prefix route after 30 days

["J. Hannken-Illjes" <hannken%eis.cs.tu-bs.de@localhost>]

Every 30 days my machines loose the IPv6 prefix route.

Setup is a router (7.0) with dhcpd and rtadvd and a bunch of machines
with dhcpcd.  File rtadvd.conf is empty, so vltime is 30 days.  Ring...

Running command "ndp -p" gives:

2001:638:602:1141::/64 if=wm1
flags=LO vltime=2592000, pltime=604800, expire=29d20h44m35s, ref=1
  No advertising router

The expire time is always "30 days - uptime".  When it reaches zero,
the prefix shows "expired" and the route to 2001:638:602:1141::/64
disappears.

On a -current machine with the same setup "ndp -p" gives:

fd23:6e0f:e899:a7b4::/64 if=cas0
flags=LO vltime=2592000, pltime=604800, expired, ref=1
  No advertising router

but here the prefix route fd23:6e0f:e899:a7b4::/64 exists.

File /etc/rc.conf has "dhcpcd=YES", no network config, no "ip6mode".
Dhcpcd is "6.7.1".

Any ideas where to look next?

--
J. Hannken-Illjes - hannken%eis.cs.tu-bs.de@localhost - TU Braunschweig (Germany)