在rc.local中添加了以下一段:
route add -net 0.0.0.0/0 netmask 0.0.0.0 gw 192.168.2.254 dev eth0
route add -net 0.0.0.0/0 netmask 0.0.0.0 gw 192.168.2.254 dev eth1
route add -net 0.0.0.0/0 netmask 0.0.0.0 gw 192.168.2.254 dev eth2
route add -net 0.0.0.0/0 netmask 0.0.0.0 gw 192.168.2.254 dev eth3
ip route add to 0.0.0.0/0 via 192.168.2.254 dev eth0 table 10
ip rule add from 192.168.2.1/32 table 10
ip route add to 0.0.0.0/0 via 192.168.2.254 dev eth1 table 20
ip rule add from 192.168.2.2/32 table 20
ip route add to 0.0.0.0/0 via 192.168.2.254 dev eth2 table 30
ip rule add from 192.168.2.3/32 table 30
ip route add to 0.0.0.0/0 via 192.168.2.254 dev eth3 table 40
ip rule add from 192.168.2.4/32 table 40