NIC 2 個とゲートウェイ 2 個の構成

私のルーターにLAN（192.168.0.1/24）とDMZ（192.168.1.1/24）があるとしましょう。マイコンピュータには2つのネットワークカードがあり、1つはLAN用、もう1つはDMZ用です。

デフォルトゲートウェイの代わりに両方のゲートウェイを使用するようにパスを設定するにはどうすればよいですか？

出力ifconfig：

eth0      Link encap:Ethernet  HWaddr 00:15:17:6f:94:44
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:458357 errors:0 dropped:0 overruns:0 frame:0
          TX packets:250537 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:646967588 (616.9 MiB)  TX bytes:33742301 (32.1 MiB)
          Interrupt:16 Memory:fc3e0000-fc400000

eth1      Link encap:Ethernet  HWaddr 00:1e:4f:13:31:b7
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:5 errors:0 dropped:0 overruns:0 frame:0
          TX packets:37 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:320 (320.0 B)  TX bytes:2992 (2.9 KiB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:18979 errors:0 dropped:0 overruns:0 frame:0
          TX packets:18979 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1
          RX bytes:10059282 (9.5 MiB)  TX bytes:10059282 (9.5 MiB)

tap103i0  Link encap:Ethernet  HWaddr 3e:fb:b1:e0:40:da
          inet6 addr: fe80::3cfb:b1ff:fee0:40da/64 Scope:Link
          UP BROADCAST RUNNING PROMISC MULTICAST  MTU:1500  Metric:1
          RX packets:520 errors:0 dropped:0 overruns:0 frame:0
          TX packets:766 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:500
          RX bytes:44796 (43.7 KiB)  TX bytes:702165 (685.7 KiB)

vmbr0     Link encap:Ethernet  HWaddr 00:15:17:6f:94:44
          inet addr:192.168.0.2  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::215:17ff:fe6f:9444/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:437651 errors:0 dropped:0 overruns:0 frame:0
          TX packets:245697 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:637230824 (607.7 MiB)  TX bytes:31203868 (29.7 MiB)

vmbr1     Link encap:Ethernet  HWaddr 00:1e:4f:13:31:b7
          inet addr:192.168.1.2  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::21e:4fff:fe13:31b7/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:5 errors:0 dropped:0 overruns:0 frame:0
          TX packets:34 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:230 (230.0 B)  TX bytes:2412 (2.3 KiB)

出力netstat -rn：

Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
0.0.0.0         192.168.0.1     0.0.0.0         UG        0 0          0 vmbr0
192.168.0.0     192.168.0.1     255.255.255.0   UG        0 0          0 vmbr0
192.168.0.0     0.0.0.0         255.255.255.0   U         0 0          0 vmbr0
192.168.1.0     192.168.1.1     255.255.255.0   UG        0 0          0 vmbr1
192.168.1.0     0.0.0.0         255.255.255.0   U         0 0          0 vmbr1

/etc/network/interfaces:

auto lo
iface lo inet loopback

iface eth0 inet manual

iface eth1 inet manual

auto vmbr0
iface vmbr0 inet static
        address 192.168.0.2
        netmask 255.255.255.0
        gateway 192.168.0.1
        bridge_ports eth0
        bridge_stp off
        bridge_fd 0
        post-up route add -net 192.168.0.0 netmask 255.255.255.0 gw 192.168.0.1


auto vmbr1
iface vmbr1 inet static
        address 192.168.1.2
        netmask 255.255.255.0
        gateway 192.168.0.2
        bridge_ports eth1
        bridge_stp off
        bridge_fd 0
        post-up route add -net 192.168.1.0 netmask 255.255.255.0 gw 192.168.1.1