Ipf crashes with ioctl(SIOCIPFFL): I/O error

Hi,
after I upgraded to Sol 10 10/08 I get the error "ioctl(SIOCIPFFL): I/O error" when running the command
ipf -Fa -f /etc/ipf/ipf.conf
Any seen this ? Any patch for this ? Is my firewall actually working now ?
B-)

Ahh - of course ! Looks like it works. Had to do a svcadm enable ipfilter first. After that I have the following - wihich looks good.
Thanx !
B-)
svcs -l ipfilter
fmri svc:/network/ipfilter:default
name IP Filter
enabled true
state online
next_state none
state_time Mon Nov 03 14:23:37 2008
logfile /var/svc/log/network-ipfilter:default.log
restarter svc:/system/svc/restarter:default
dependency require_all/restart file://localhost/etc/ipf/ipf.conf (online)
dependency require_all/none svc:/system/filesystem/usr (online)
dependency require_all/restart svc:/network/pfil (online)
dependency require_all/restart svc:/network/physical (online)
dependency require_all/restart svc:/system/identity:node (online)

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