#!/bin/sh
IPv4=$PPP_LOCAL
IPv6=$(printf "2002:%02x%02x:%02x%02x::1" `echo $IPv4 | tr "." " "`)

/sbin/ip tunnel add tun6to4 mode sit ttl 64 remote any local $IPv4
/sbin/ip link set dev tun6to4 up
/sbin/ip -6 addr add $IPv6/16 dev tun6to4
/sbin/ip -6 route add 2000::/3 via ::192.88.99.1 dev tun6to4 metric 1