Linux之路由的添加删除（ip route）

查看路由：

#route
#route -n
#ip route show | column -t

 

获取帮助

[root@x101 ~]# man ip route
[root@x101 ~]# ip route help

[root@x101 ~]# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.0.1     0.0.0.0         UG    100    0        0 eth0
192.168.0.0     0.0.0.0         255.255.255.0   U     100    0        0 eth0
192.168.0.0     0.0.0.0         255.255.255.0   U     101    0        0 eth1
[root@x101 ~]# ip route del 192.168.0.0 via 0.0.0.0
RTNETLINK answers: No such process
删除路由表指定条目信息
[root@x101 ~]# ip route del 192.168.0.0/24 via 0.0.0.0
[root@x101 ~]# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.0.1     0.0.0.0         UG    100    0        0 eth0
192.168.0.0     0.0.0.0         255.255.255.0   U     101    0        0 eth1
[root@x101 ~]# 
[root@x101 ~]# ip route  help
Usage: ip route { list | flush } SELECTOR
       ip route save SELECTOR
       ip route restore
       ip route showdump
       ip route get ADDRESS [ from ADDRESS iif STRING ]
                            [ oif STRING ]  [ tos TOS ]
                            [ mark NUMBER ]
       ip route { add | del | change | append | replace } ROUTE

　　

[root@x101 ~]# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.0.1     0.0.0.0         UG    100    0        0 eth0
192.168.0.0     0.0.0.0         255.255.255.0   U     101    0        0 eth1
添加路由表指定路由信息
[root@x101 ~]# ip route add 192.168.0.0/24 via 0.0.0.0 dev eth0 metric 99
[root@x101 ~]# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.0.1     0.0.0.0         UG    100    0        0 eth0
192.168.0.0     0.0.0.0         255.255.255.0   U     99     0        0 eth0
192.168.0.0     0.0.0.0         255.255.255.0   U     101    0        0 eth1
[root@x101 ~]# 

　

添加默认路由信息
[root@x101 ~]# ip route add default via 192.168.1.1(网关地址)  dev eth0

　　

　

[root@x101 ~]# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.0.1     0.0.0.0         UG    100    0        0 eth0
192.168.0.0     0.0.0.0         255.255.255.0   U     99     0        0 eth0
192.168.0.0     0.0.0.0         255.255.255.0   U     101    0        0 eth1
删除默认路由信息
[root@x101 ~]# ip route del default via 192.168.0.1 dev eth0
[root@x101 ~]# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.0.0     0.0.0.0         255.255.255.0   U     99     0        0 eth0
192.168.0.0     0.0.0.0         255.255.255.0   U     101    0        0 eth1