ipv6.sh

#!/usr/bin/env bash

function setupipv6
{
    echo
    myip=`ifconfig eth0 | awk '/inet / {print $2}'`
    ip tunnel add is0 mode sit remote 10.10.5.56 local $myip
    ip link set is0 up
    ip addr add 2001:da8:e000:90:0:5efe:$myip/64 dev is0
    ip route add default via 2001:da8:e000:90::1 dev is0
    echo
    if ifconfig | grep is0 >/dev/null
    then
        echo "Success to set up IPv6 Tunnel !"
    else
        echo "Fail to set up IPv6 Tunnel !"
    fi
    echo
}

if [ $# -lt 1 ]; then
    setupipv6
elif [ "$1" == "-r" ]; then
    ip tunnel del is0
    setupipv6
elif [ "$1" == "-d" ]; then
    ip tunnel del is0
else
    echo
    echo "Usage: ipv6    : set up ipv6 tunnel"
    echo "       ipv6 -d : unset ipv6 tunnel"
    echo "       ipv6 -r : reset up ipv6 tunnel"
    echo
fi