ip link show # 显示网络接口信息 ip link set eth0 up # 开启网卡 ip link set eth0 down # 关闭网卡 ip link set eth0 promisc on # 开启网卡的混合模式 ip link set eth0 promisc offi # 关闭网卡的混合模式 ip link set eth0 txqueuelen 1200 # 设置网卡队列长度 ip link set eth0 mtu 1400 # 设置网卡最大传输单元 ip addr show # 显示网卡IP信息 ip addr add 192.168.0.1/24 dev eth0 # 为eth0网卡添加一个新的IP地址192.168.0.1 ip addr del 192.168.0.1/24 dev eth0 # 为eth0网卡删除一个IP地址192.168.0.1
ip route show # 显示系统路由 ip route add default via 192.168.1.254 # 设置系统默认路由 ip route list # 查看路由信息 ip route add 192.168.4.0/24 via 192.168.0.254 dev eth0 # 设置192.168.4.0网段的网关为192.168.0.254,数据走eth0接口 ip route add default via 192.168.0.254 dev eth0 # 设置默认网关为192.168.0.254 ip route del 192.168.4.0/24 # 删除192.168.4.0网段的网关 ip route del default # 删除默认路由 ip route delete 192.168.1.0/24 dev eth0 # 删除路由
用ip命令显示网络设备的运行状态
1 2 3 4 5 6 7
[root@localhost ~]# ip link list 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000 link/ether 00:16:3e:00:1e:51 brd ff:ff:ff:ff:ff:ff 3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000 link/ether 00:16:3e:00:1e:52 brd ff:ff:ff:ff:ff:ff
[root@localhost ~]# ip route list 112.124.12.0/22 dev eth1 proto kernel scope link src 112.124.15.130 10.160.0.0/20 dev eth0 proto kernel scope link src 10.160.7.81 192.168.0.0/16 via 10.160.15.247 dev eth0 172.16.0.0/12 via 10.160.15.247 dev eth0 10.0.0.0/8 via 10.160.15.247 dev eth0 default via 112.124.15.247 dev eth1
显示邻居表
1 2 3
[root@localhost ~]# ip neigh list 112.124.15.247 dev eth1 lladdr 00:00:0c:9f:f3:88 REACHABLE 10.160.15.247 dev eth0 lladdr 00:00:0c:9f:f2:c0 STALE