Seen when ipv6 router advertisements are disabled.
Product defect: 681996
To be fixed in the next maintenance release of Authentication Services. The current release version is 188.8.131.5224.
Edit /etc/init.d/ipmon script by going to line: 71 and changing
kill "$@" "$pid" 2>/dev/null
kill "$@" "-$pid" 2>/dev/null
Very subtle difference but the '-' in front of $pid is a group kill option, and will resolve the issue.