09 Dec 2015
# 方法1 cat /etc/sysconfig/network-scripts/ifcfg-eth0 |grep GATEWAY GATEWAY=172.16.2.1 # 方法2 route | grep default default 172.16.2.1 0.0.0.0 UG 0 0 0 eth0
route | grep default default 172.16.2.1 0.0.0.0 UG 0 0 0 eth0
使用net-tools-1.60-110.el6_2.x86_64中的route命令
# 查看路由 route Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.0.2.0 * 255.255.255.0 U 0 0 0 eth0 192.168.33.0 * 255.255.255.0 U 0 0 0 eth1 link-local * 255.255.0.0 U 1002 0 0 eth0 link-local * 255.255.0.0 U 1003 0 0 eth1 default 10.0.2.2 0.0.0.0 UG 0 0 0 eth0 # 参数: # -n,解析hostname为ip显示 route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.0.2.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 192.168.33.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 169.254.0.0 0.0.0.0 255.255.0.0 U 1002 0 0 eth0 169.254.0.0 0.0.0.0 255.255.0.0 U 1003 0 0 eth1 0.0.0.0 10.0.2.2 0.0.0.0 UG 0 0 0 eth0 # 增加路由 route add -net 172.16.0.0/16 gw 10.0.2.2 dev eth0 # dev参数可有可无 # 删除路由 route del -net 172.16.0.0/16 gw 10.0.2.2 dev eth0
使用iproute-2.6.32-54.el6.x86_64中的ip命令
# 查看路由 ip route 10.0.2.0/24 dev eth0 proto kernel scope link src 10.0.2.15 192.168.33.0/24 dev eth1 proto kernel scope link src 192.168.33.10 169.254.0.0/16 dev eth0 scope link metric 1002 169.254.0.0/16 dev eth1 scope link metric 1003 default via 10.0.2.2 dev eth0 # 增加路由 ip route add 172.16.0.0/16 via 10.0.2.2 dev eth0 # 修改路由 # 删除路由 ip route del 172.16.0.0/16 via 10.0.2.2 dev eth0
配置文件: /etc/sysconfig/network-scripts/route-ifname,ifname是网卡名称,例如eth0
default via 10.0.0.1 [dev eth0] 172.16.0.0/16 via 10.0.2.2
/etc/sysconfig/static-routes与/etc/sysconfig/network-scripts/route-ifname区别# 若ifdown掉某个网卡,重新ifup它,是不会重载static-routes的 # 创建static-routes文件,此文件默认不存在 echo 'any net 172.16.0.0/16 gw 10.0.2.2 eth0' > /etc/sysconfig/static-routes # 重载network服务 service network restart # 查看eth0的路由 ip route show dev eth0 10.0.2.0/24 proto kernel scope link src 10.0.2.15 172.16.0.0/16 via 10.0.2.2 169.254.0.0/16 scope link metric 1002 default via 10.0.2.2 # down掉eth0,然后在up它 ifdown eth0 ifup eth0 # 发现写在static-routes文件中的路由不存在了 ip route show dev eth0 10.0.2.0/24 proto kernel scope link src 10.0.2.15 169.254.0.0/16 scope link metric 1002 default via 10.0.2.2
# 创建route-eth0文件 echo "172.16.0.0/16 via 10.0.2.2" > /etc/sysconfig/network-scripts/route-eth0 # 重启network服务 service network restart ip route show dev eth0 10.0.2.0/24 proto kernel scope link src 10.0.2.15 172.16.0.0/16 via 10.0.2.2 169.254.0.0/16 scope link metric 1002 default via 10.0.2.2 # down掉eth0,然后在up它 ifdown eth0 ifup eth0 # 发现写在route-eth0文件中的路由又回来了 ip route show dev eth0 10.0.2.0/24 proto kernel scope link src 10.0.2.15 172.16.0.0/16 via 10.0.2.2 169.254.0.0/16 scope link metric 1002 default via 10.0.2.2