Someone

#!/bin/bash
#
#Declarando Variaveis
IF0='eth0'
IF1='eth1'
IF2='eth2'
IP_IF1=$(/sbin/ifconfig ${IF1} | awk '/inet addr:/ {print $2}' | cut -d: -f2)
IP_IF2=$(/sbin/ifconfig ${IF2} | awk '/inet addr:/ {print $2}' | cut -d: -f2)
GW_IF1='200.171.103.193'
GW_IF2='192.168.3.1'
REDE0='192.168.0.0/24'
REDE1='200.171.103.0/26'
REDE2='192.168.3.0/24'
IPTESTE='200.160.2.3'
IPTABLES=$(which iptables)
ROUTE=$(which route)
FPING=$(which fping)
SSL='443'

#route add -host ${IPTESTE} gw ${GW_IF1}
#TESTALINK1=$(fping -r 1 ${IPTESTE} |awk -F " " '{print $3}')
#route del -host ${IPTESTE}
#TESTALINK1=$(fping -r 1 ${IPTESTE} |awk -F " " '{print $3}')

#read
#Ajustando tabelas default
echo "255 local" > /etc/iproute2/rt_tables
echo "254 main" >> /etc/iproute2/rt_tables
echo "253 default" >> /etc/iproute2/rt_tables
echo "0 unspec" >> /etc/iproute2/rt_tables
#Adicionando novas tabelas
echo "200 T1" >> /etc/iproute2/rt_tables
echo "201 T2" >> /etc/iproute2/rt_tables

#Resetando tabelas
#ip route flush default
#ip route flush table T1
#ip route flush table T2
ip route flush cache

#Criando rotas paras novas tabelas

ip rule add from ${IP_IF1} table T1
ip route add 127.0.0.0/8 dev lo table T1
ip route add ${REDE1} dev ${IF1} src ${IP_IF1} table T1
ip route add default via ${GW_IF1} dev ${IF1} table T1
ip rule add fwmark 1 table T1 prio 10

ip rule add from ${IP_IF2} table T2
ip route add 127.0.0.0/8 dev lo table T2
ip route add ${REDE2} dev ${IF2} src ${IP_IF2} table T2
ip route add default via ${GW_IF2} dev ${IF2} table T2
ip rule add fwmark 2 table T1 prio 20

#Loadbalance
#Atenção caso tenha um limk mais potente que o outro mude a prioridade do mesmo pra "2"

ip route add default nexthop via ${GW_IF1} dev ${IF1} weight 1 \
   nexthop via ${GW_IF2} dev ${IF2} weight 1

ip route flush cache