diff --git a/src/man/man8/ifctl.8 b/src/man/man8/ifctl.8
index 83d478740..991e1b5d1 100644
--- a/src/man/man8/ifctl.8
+++ b/src/man/man8/ifctl.8
@@ -24,7 +24,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd July 22, 2022
+.Dd July 25, 2022
 .Dt IFCTL 8
 .Os
 .Sh NAME
@@ -41,12 +41,22 @@ The
 .Nm
 utility will display or modify network device related data used by dynamic
 connections.
-If one of
+.Pp
+If none of
 .Sq Fl c ,
 .Sq Fl d
 or
 .Sq Fl a
 are given the current data is returned instead of modifying it.
+In this case a special interface suffix
+.Sq :slaac
+is supported as a fallback option and read if no data file was found
+for the exact interface match.
+During modification using any option mentioned above, however, the
+.Sq :slaac
+suffix must be given explicitly through the
+.Sq Fl i
+parameter.
 .Pp
 The options are as follows:
 .Bl -tag -width ".Fl i Ar interface" -offset indent
@@ -70,6 +80,10 @@ Delete the specified data of the selected device.
 Select the
 .Ar device
 to operate on.
+Special suffix
+.Sq :slaac
+given creates a fallback configuration file only to be read
+if no exact match for the selected interface exists.
 If none was given
 .Nm
 list the available devices.
diff --git a/src/opnsense/scripts/interfaces/nameserver.sh b/src/opnsense/scripts/interfaces/nameserver.sh
index 4edc90808..5832b8693 100755
--- a/src/opnsense/scripts/interfaces/nameserver.sh
+++ b/src/opnsense/scripts/interfaces/nameserver.sh
@@ -58,10 +58,10 @@ while getopts 46a:cdi:lnprsV OPT; do
 		EX=v6
 		;;
 	a)
-		DO_COMMAND="-a"
 		DO_CONTENTS="${DO_CONTENTS} ${OPTARG}"
 		;;
 	c)
+		DO_COMMAND="-c"
 		MD="nameserver prefix router searchdomain"
 		;;
 	d)
@@ -107,9 +107,11 @@ if [ "${DO_COMMAND}" = "-c" ]; then
 
 	# iterate through possible files
 	for MD in nameserver prefix router searchdomain; do
-		FILE="/tmp/${IF}_${MD}${EX}"
-		flush_routes
-		rm -f ${FILE}
+		for IFC in ${IF} ${IF}:slaac; do
+			FILE="/tmp/${IFC}_${MD}${EX}"
+			flush_routes
+			rm -f ${FILE}
+		done
 	done
 
 	exit 0
@@ -138,11 +140,22 @@ fi
 if [ "${DO_COMMAND}" = "-d" ]; then
 	flush_routes
 	rm -f ${FILE}
-elif [ "${DO_COMMAND}" = "-a" ]; then
-	for CONTENT in ${DO_CONTENTS}; do
-		echo "${CONTENT}" >> ${FILE}
-	done
+fi
+
+for CONTENT in ${DO_CONTENTS}; do
+	echo "${CONTENT}" >> ${FILE}
+done
+
+if [ -n "${DO_COMMAND}${DO_CONTENT}" ]; then
+	exit 0
+fi
+
+if [ ! -f ${FILE} ]; then
+	# move to :slaac interface suffix if not found
+	FILE="/tmp/${IF}:slaac_${MD}${EX}"
+fi
+
 # if nothing else could be done display data
-elif [ -f ${FILE} ]; then
+if [ -f ${FILE} ]; then
 	cat ${FILE}
 fi
diff --git a/src/opnsense/scripts/interfaces/rtsold_resolvconf.sh b/src/opnsense/scripts/interfaces/rtsold_resolvconf.sh
index d3546c7a8..f6da0f267 100755
--- a/src/opnsense/scripts/interfaces/rtsold_resolvconf.sh
+++ b/src/opnsense/scripts/interfaces/rtsold_resolvconf.sh
@@ -33,25 +33,16 @@ if [ -z "${2}" ]; then
 fi
 
 # ${2} is 'ifname:slaac:[RA-source-address]', where 'ifname' is the
-# interface the RA was received on.
+# interface the RA was received on.  Keep the ":slaac" suffix to create
+# an interface fallback configuration handled through ifctl(8) utility.
 
-ifname=${2%%:*}
-rasrca=${2##*:slaac:[}
+ifname=${2%%:[*}
+rasrca=${2##*:[}
 rasrca=${rasrca%]}
 
-# XXX replace by exlusive 'ifname:slaac' use and falling back internally in ifctl?
-if [ -n "$(/usr/local/sbin/ifctl -i ${ifname} -6r)" ]; then
-	echo "IPv6 gateway for ${ifname} already exists."
-	exit 0
-fi
-
 # ${1} indicates whether DNS information should be added or deleted.
 
 if [ "${1}" = "-a" ]; then
-	/usr/local/sbin/ifctl -i ${ifname} -6rd -a ${rasrca}
-	# XXX stop modifying defaultgw files in scripts
-	echo ${rasrca} > /tmp/${ifname}_defaultgwv6
-
 	# rtsold sends a resolv.conf(5) file to STDIN of this script
 	while IFS=' ' read -r type value; do
 		if [ "${type}" = "nameserver" ]; then
@@ -71,7 +62,14 @@ if [ "${1}" = "-a" ]; then
 
 	/usr/local/sbin/ifctl -i ${ifname} -6nd ${nameservers}
 	/usr/local/sbin/ifctl -i ${ifname} -6sd ${searchlist}
-	/usr/local/sbin/configctl -d interface newipv6 ${ifname}
-fi
+	/usr/local/sbin/ifctl -i ${ifname} -6rd -a ${rasrca}
 
-# XXX implement -d as well
+	# remove slaac suffix here to reload correct interface
+	/usr/local/sbin/configctl -d interface newipv6 ${ifname%%:slaac}
+elif [ "${1}" = "-d" ]; then
+	/usr/local/sbin/ifctl -i ${ifname} -6nd
+	/usr/local/sbin/ifctl -i ${ifname} -6sd
+
+	# reload DNS since data has been scrubbed
+	/usr/local/sbin/configctl -d dns reload
+fi