三種路由類型:
1.主機路由(H):路由選擇表中指向單個Ip地址或者主機名的路由記錄,Flags字段爲H
2.網絡路由(N):主機可以到達的網絡,Flags字段爲N
3.默認路由(G):當主機不能在路由表中查找到目標Ip地址或者網絡路由時,數據包將發送到默認路由上,Flags字段爲G
Flags爲路由標誌,編輯當前網絡節點的狀態
·U up代表路由當前爲啓動狀態 ·H host表示此網關爲一個主機 ·G gateway此網關爲一個路由器 ·R reinstate route使用動態路由重新初始化的路由 ·D dynamically,此路由是動態寫入的 ·M modified是有路由守護程序或導向器修改 ·! 此路由當前爲關閉狀態
# route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default 10.0.7.253 0.0.0.0 UG 0 0 0 eth0
default 10.0.6.253 0.0.0.0 UG 1001 0 0 eth1
10.0.6.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
10.0.7.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 10.0.7.253 0.0.0.0 UG 0 0 0 eth0
0.0.0.0 10.0.6.253 0.0.0.0 UG 1001 0 0 eth1
10.0.6.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
10.0.7.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
route add default gw 10.0.7.253 dev eth0
route add default gw 10.0.6.253 dev eth1
route add -net 10.0.6.0 netmask 255.255.255.0 dev eth1
route add -net 10.0.7.0 netmask 255.255.255.0 dev eth0
添加
添加路由
route -v add
route add -net 192.168.56.0/24 dev eth0
route add -net 192.168.56.0/24 gw 192.168.56.1
route add -net 192.168.56.0 netmask 255.255.255.0 gw 192.168.56.1
route add -net 192.168.56.0 netmask 255.255.255.0 gw 192.168.56.1 dev eth0 metric 1
添加默認路由
route add default gw 192.168.56.1 dev eth0
route add -net 0.0.0.0 gw 192.168.56.1 netmask 0.0.0.0 dev eth0
刪除
清空路由表
# ip route | awk '{print $1}' | while read line; do ip route del $line; done
刪除路由
route -v del
route del -net 192.168.56.0 netmask 255.255.255.0
route del -net 192.168.56.0 netmask 255.255.255.0 dev eth0
route del -net 192.168.56.0 dev eth0
刪除默認路由
route del default
route del default dev enp0s8
route del default dev enp0s9