centos使用雙網絡卡時，如果要指定其中乙個網絡卡的閘道器作為預設路由，不能直接用route命令進行修改，或者只是刪除其中乙個預設路由。例如：
[expert@sec-cpsc-8001sz:0]# ifconfig
eth0
link
encap
:ethernet
hwaddr 00:50
:56:a6
:4f:9a
inet
addr
:99.1
.1.1
bcast
:99.1
.16.255
mask
:255
.255
.255
.0up
broadcast
running
multicast
mtu:1500
metric
:1rx
packets
:264636824
errors
:0dropped
:0overruns
:0frame
:0tx
packets
:1630865
errors
:0dropped
:0overruns
:0carrier
:0collisions
:0txqueuelen
:1000
rxbytes
:24486306913 (22.8
gib) tx
bytes
:2105592006 (1.9
gib)
eth1
link
encap
:ethernet
hwaddr 00:50
:56:a6
:7e:f4
inet
addr
:192
.168
.127
.8bcast
:192
.168
.127
.8mask
:255
.255
.255
.255
upbroadcast
multicast
mtu:1500
metric
:1rx
packets
:0errors
:0dropped
:0overruns
:0frame
:0tx
packets
:0errors
:0dropped
:0overruns
:0carrier
:0collisions
:0txqueuelen
:1000
rxbytes
:0 (0.0
b) tx
bytes
:0 (0.0
b)lo
link
encap
:local
loopback
inet
addr
:127
.0.0
.1mask
:255
.0.0
.0up
loopback
running
mtu:16436
metric
:1rx
packets
:132847578
errors
:0dropped
:0overruns
:0frame
:0tx
packets
:132847578
errors
:0dropped
:0overruns
:0carrier
:0collisions
:0txqueuelen
:0rx
bytes
:51965842204 (48.3
gib) tx
bytes
:51965842204 (48.3
gib)
cd /etc/sysconfig/network-scripts
echo 'iif eth1 table 1
from
192.168
.127
.8 table1' > rule-eth1
echo '192.168.127.0/24 dev eth1 table 1
default via 192.168
.127
.253 dev eth1 table 1
' > route-eth1
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