Persisting advmss across reboots

route-eth0

#!/bin/bash

# This takes advantage of the code in /etc/sysconfig/network-scripts/ifup-routes
# handle_file () {
#     . $1
#     routenum=0
#     while [ "x$(eval echo '$'ADDRESS$routenum)x" != "xx" ]; do
#         eval $(ipcalc -p $(eval echo '$'ADDRESS$routenum) $(eval echo '$'NETMASK$routenum))
#         line="$(eval echo '$'ADDRESS$routenum)/$PREFIX"
#         if [ "x$(eval echo '$'GATEWAY$routenum)x" != "xx" ]; then
#             line="$line via $(eval echo '$'GATEWAY$routenum)"
#         fi
#         line="$line dev $2"
#         /sbin/ip route add $line
#         routenum=$(($routenum+1))
#     done
# }

# NOTE: Only do this if you're not using DHCP for some reason
GW="$(ip route show 0.0.0.0/0 dev eth0 | cut -d\  -f3)"

GATEWAY0="$GW advmss 1380"
NETMASK0=255.255.255.192
ADDRESS0=10.20.101.0