diff --git a/openwrt/openwrt-add-jool-ipv4island.sh b/openwrt/openwrt-add-jool-ipv4island.sh
index 3b1c7d6..3349385 100755
--- a/openwrt/openwrt-add-jool-ipv4island.sh
+++ b/openwrt/openwrt-add-jool-ipv4island.sh
@@ -1,15 +1,19 @@
 #!/bin/sh
 
-if [ $# -ne 2 ]; then
+if [ $# -ne 1 ]; then
     echo "$0 ip-address nat64-prefix"
     echo "    ip-address: where to find the OpenWRT device"
-    echo "    nat64-prefix: which network to use for INCOMING NAT64 (often 2a0a:e5c1:XXX:b00::/96"
+    echo "    nat64-prefix: how to reach the ipv4 hosts"
+    echo ""
+    echo "Example:"
+    echo "$0 2a0a:e5c1:301::42 2a0a:e5c1:301:b00::/96"
+    echo ""
+    echo "This maps 2a0a:e5c1:301:b00::/96 to the IPv4 addresses on the device 2a0a:e5c1:301::42"
     exit 1
 fi
 
 my_ip=$1; shift
 nat64_prefix=$1; shift
-v4addr=$1; shift
 
 cat <<EOF | ssh -t "root@${my_ip}"
 set -x
@@ -17,13 +21,15 @@ set -x
 opkg update
 opkg install kmod-jool jool-tools
 
-cat > /etc/rc.local << EO2
+sysctl -w net.ipv6.conf.all.accept_ra=2
 
 modprobe jool
 
 jool -6 ${nat64_prefix}
-EO2
 
-sh /etc/rc.local
+# OpenWRT has 192.168.1. assigned on LAN by default
+# Probably not even necessary
+# jool -4 -a 192.168.1.1
+
 
 EOF
diff --git a/openwrt/viwib-2-configure.sh b/openwrt/viwib-2-configure.sh
index 72c6e7d..b38f41c 100755
--- a/openwrt/viwib-2-configure.sh
+++ b/openwrt/viwib-2-configure.sh
@@ -119,7 +119,7 @@ uci delete wireless.radio0.disabled
 
 uci commit
 
-ping6 -c5 ungleich.ch || exit 1
+ping -c5 ungleich.ch || exit 1
 
 # update the sources
 opkg update