最後更新: 2015-08-10
Making the route permanent
在 Centos 6 上設定 permanent route 及 行 script 的方法
network 與 route-ethX 的分別
# set default gateway IP address.
/etc/sysconfig/network
# set additional static gateway IP address.
/etc/sysconfig/network-scripts/route-ethX
"route-eth0" Example
/etc/sysconfig/network-scripts/route-eth0
188.165.229.254 dev eth0 default via 188.165.229.254 dev eth0
Service network restart
"service network restart" 是靠 "/sbin/ifdown" 及 "/sbin/ifup" 去實現 restart 的
它們會執行 "/etc/sysconfig/network-scripts/" 內有關的 scripts
部份有關的 scripts 如下
ifup-routes (file: route-ethX)
Adds static routes for a device as its interface is brought up.
ifup-post
它是在 interface "up" 後會行的 script
................... if [ -x /sbin/ifup-local ]; then /sbin/ifup-local ${DEVICE} fi
/sbin/ifup-local
自定某 interface "up" 後自己想行的 script
#!/bin/bash
if [[ "$1" == "eth0:1" ]]
then
echo "this part will be executed right after eth0:1 is up."
echo "so you can put any startup command for eth0 here"
else
#DO_NOTHING
echo -n ""
fi
Dual Gateway Example
/sbin/ifup-local
................... ip route add 192.168.88.0/24 dev eth0:1 src 192.168.88.184 table rt2 ip route add default via 192.168.88.5 dev eth0:1 table rt2 ip rule add from 192.168.88.184/32 table rt2 ip rule add to 192.168.88.184/32 table rt2 ...................
/etc/sysconfig/network-scripts/ifcfg-eth0:1
iface eth0:1 inet static address 10.10.0.10 netmask 255.255.255.0 post-up ip route add 192.168.88.0/24 dev eth0 src 192.168.88.184 table rt2 post-up ip route add default via 192.168.88.5 dev eth0 table rt2 post-up ip rule add from 192.168.88.184/32 table rt2 post-up ip rule add to 192.168.88.184/32 table rt2
OR
/etc/sysconfig/network-scripts/route-eth0
192.168.88.0/24 dev eth0:1 src 192.168.88.184 table rt2 default via 192.168.88.5 dev eth0:1 table rt2 from 192.168.88.184/24 table rt2 to 192.168.88.184 table rt2