diff -Nrux .svn -x work /usr/ports/net/isc-dhcp41-relay/pkg-plist isc-dhcp41-relay/pkg-plist
--- /usr/ports/net/isc-dhcp41-relay/pkg-plist	2010-05-06 13:24:00.000000000 -0700
+++ isc-dhcp41-relay/pkg-plist	2011-06-02 20:29:19.663540388 -0700
@@ -1,4 +1,6 @@
 @comment $FreeBSD: ports/net/isc-dhcp41-relay/pkg-plist,v 1.1 2010/05/06 20:24:00 wxs Exp $
 @unexec %D/etc/rc.d/isc-dhcrelay.sh forcestop 2>/dev/null || true
 @unexec %D/etc/rc.d/isc-dhcrelay forcestop 2>/dev/null || true
+%%IPV6%%@unexec %D/etc/rc.d/isc-dhcrelay6 forcestop 2>/dev/null || true
+%%IPV6%%etc/rc.d/isc-dhcrelay6
 sbin/dhcrelay
diff -Nrux .svn -x work /usr/ports/net/isc-dhcp41-server/Makefile isc-dhcp41-server/Makefile
--- /usr/ports/net/isc-dhcp41-server/Makefile	2011-05-08 17:58:17.000000000 -0700
+++ isc-dhcp41-server/Makefile	2011-06-02 20:50:42.030872118 -0700
@@ -24,7 +24,7 @@
 PATCHLEVEL=	R2
 PORTREVISION_SERVER=	0
 PORTREVISION_CLIENT=	0
-PORTREVISION_RELAY=	0
+PORTREVISION_RELAY=	1
 
 SUBSYS?=	server
 WRKSRC=		${WRKDIR}/${PORTNAME}-${DISTVERSION}-${PATCHLEVEL}
@@ -198,6 +198,10 @@
 .if defined(WITH_DHCP_IPV6)
 	@${LN} -sf isc-dhcpd ${PREFIX}/etc/rc.d/isc-dhcpd6
 .endif
+.elif ${SUBSYS} == relay
+.if defined(WITH_DHCP_IPV6)
+	@${LN} -sf isc-dhcrelay ${PREFIX}/etc/rc.d/isc-dhcrelay6
+.endif
 .endif
 	@${SED} ${PKGMESSAGE_SUB:S/$/!g/:S/^/ -e s!%%/:S/=/%%!/} \
 		${MSG_FILE} > ${PKGMESSAGE}
diff -Nrux .svn -x work /usr/ports/net/isc-dhcp41-server/files/isc-dhcrelay.in isc-dhcp41-server/files/isc-dhcrelay.in
--- /usr/ports/net/isc-dhcp41-server/files/isc-dhcrelay.in	2010-05-06 13:24:01.000000000 -0700
+++ isc-dhcp41-server/files/isc-dhcrelay.in	2011-06-02 20:29:19.702538673 -0700
@@ -16,25 +16,49 @@
 # dhcrelay_servers=""			# dhcrelay server(s)
 # dhcrelay_ifaces=""			# ethernet interface(s)
 
+case $0 in
+/etc/rc*)
+	# during boot (shutdown) $0 is /etc/rc (/etc/rc.shutdown),
+	# so get the name of the script from $_file
+	name=$_file
+	;;
+*)
+	name=$0
+	;;
+esac
+
+name=${name##*/isc-}
+
+case ${name} in
+*6)
+	ipversion=-6
+	;;
+*)
+	ipversion=-4
+	;;
+esac
+
 dhcrelay_precmd ()
 {
-	local ifaces
+	local ifaces _servers _ifaces
+	
+	eval "_servers=\${${name}_servers}"
+	eval "_ifaces=\${${name}_ifaces}"
 
-	if [ -z "${dhcrelay_servers}" ]; then
-		err 1 "no dhcrelay server(s) configured."
+	if [ -z "${_servers}" ]; then
+		err 1 "no ${name} server(s) configured."
 	fi
 
 	ifaces=
-	for iface in ${dhcrelay_ifaces}; do
+	for iface in ${_ifaces}; do
 		ifaces="${ifaces} -i ${iface}"
 	done
 
-	rc_flags="${rc_flags} ${ifaces} ${dhcrelay_servers}"
+	rc_flags="${rc_flags} ${ipversion} ${ifaces} ${_servers}"
 }
 
 . /etc/rc.subr
 
-name=dhcrelay
 rcvar=${name}_enable
 
 command=%%PREFIX%%/sbin/${name}