--- ethernet.orig	2012-03-06 16:50:58.246739000 +0100
+++ ethernet	2012-03-06 16:50:38.986739006 +0100
@@ -132,13 +132,15 @@
         done
     fi
 
+    SYSCTL_INTERFACE="${INTERFACE/.//}"
+
     # Load ipv6 module if necessary (FS#25530)
     case "$IP6" in
     dhcp*|stateless|static)
         [ -d "/proc/sys/net/ipv6" ] || modprobe ipv6
         ;;
     ""|no)
-        [ -d /proc/sys/net/ipv6 ] && sysctl -q -w net.ipv6.conf.$INTERFACE.accept_ra=0
+        [ -d /proc/sys/net/ipv6 ] && sysctl -q -w net.ipv6.conf.$SYSCTL_INTERFACE.accept_ra=0
         ;;
     *)
         report_iproute "IP6 must be 'dhcp', 'dhcp-noaddr', 'stateless', 'static' or 'no'"
@@ -150,11 +152,9 @@
         if [[ -x /usr/sbin/dhclient ]]; then
             _DHCLIENT_PIDFILE=/run/dhclient6-${INTERFACE}.pid
             if [[ "$IP6" = "dhcp-noaddr" ]]; then
-                sysctl -q -w net.ipv6.conf.$INTERFACE.accept_ra=1
                 DHCLIENT6_OPTIONS="-S ${DHCLIENT6_OPTIONS}"
-            else
-                sysctl -q -w net.ipv6.conf.$INTERFACE.accept_ra=0
             fi
+            sysctl -q -w net.ipv6.conf.$SYSCTL_INTERFACE.accept_ra=1
             rm -r ${_DHCLIENT_PIDFILE} &>/dev/null
             report_debug ethernet_up dhclient -6 -q -e TIMEOUT="${DHCP_TIMEOUT:-10}" -pf ${_DHCLIENT_PIDFILE} "$INTERFACE"
             if ! dhclient -6 -q -e TIMEOUT="${DHCP_TIMEOUT:-10}" -pf ${_DHCLIENT_PIDFILE} ${DHCLIENT6_OPTIONS} "$INTERFACE"; then
@@ -167,10 +167,10 @@
         fi
         ;;
     stateless)
-        sysctl -q -w net.ipv6.conf.$INTERFACE.accept_ra=1
+        sysctl -q -w net.ipv6.conf.$SYSCTL_INTERFACE.accept_ra=1
         ;;
     static)
-        sysctl -q -w net.ipv6.conf.$INTERFACE.accept_ra=0
+        sysctl -q -w net.ipv6.conf.$SYSCTL_INTERFACE.accept_ra=0
         if [[ -n "$ADDR6" ]]; then
             for addr in "${ADDR6[@]}"; do
                 report_debug ethernet_iproute_up ip -6 addr add "$addr" dev "$INTERFACE"