Routers and gateways

A. Route set

1, View: route -n

2、添加： route    add    [-net|-host]  target [netmask Nm] [gw Gw] [[dev If]

　　Goal: 192.168.40.211 Gateway: 192.168.40.1 (must be in the same network as the local address)

　　Such as: [root @ zjz ~] # route add -host 192.168.40.211 gw 192.168.40.1 dev ens33 (NIC through which local)

3、ip route add TARGET via GW [dev IFACE] [src SOURCE_IP]

(Dev an outflow interface, via: via next hop)

 For example: ip route add 192.168.1.3 via 172.16.0.1 dev eth0

            ip route add 192.168.0.0/24 via 172.16.0.1

 Note TARGET in the format:

 Host route: IP

 Network Routing: NETWORK / MASK

[root@localhost ~]# ip route show   或者 ip route list
default via 192.168.40.2 dev ens33 proto static metric 100
192.168.40.0/24 dev ens33 proto kernel scope link src 192.168.40.211 metric 100

 

4、[root@localhost ~]# ip route add 192.168.40.132 via 192.168.40.1 dev ens33

 

5, delete the route: ip route del IP

 

6, profile permanent

vim    /etc/rc.local

 

Second, the difference between routing and gateway

Gateway is a ip, when a network to other network to go through a "gateway"

Route: communication address routing table, containing direction "destination" can be understood as the path.