fixroutes.sh

# Inserting routes in the adsl1 table
ip route add 192.168.1.0/24 dev eth0 scope link table adsl1
ip route add default via 192.168.1.1 dev eth0 table adsl1

# Inserting routes in the adsl2 table
ip route add 192.168.2.0/24 dev eth0 scope link table adsl2
ip route add default via 192.168.2.1 dev eth0 table adsl2

# ip rule is the source routing magic. This will redirect
# packets coming from source "X" to table "adsl1", "adsl2" or "default".
ip rule add from 192.168.1.0/24 table adsl1
ip rule add from 192.168.2.0/24 table adsl2