The Linux IP command

The IP command is a network configuration tool for Route2 that replaces commands such as Ifconfig,route. This command is only temporarily added, and restarting the NIC IP is lost.

Common parameters

Link: Often used to see the net view properties

Addr: For configuring/removing multiple IPs

Route: Used to configure routing information

Rule: Used to view the routing table

Detailed command:

IP link: Mainly used to view network card properties, or turn on, turn off the network card

Show

Set

Example: Show

[[Email protected] ~]# IP link show # # # # #查看所有网卡的硬件属性, not including the IP address

1:lo: <LOOPBACK,UP,LOWER_UP> MTU 16436 qdisc noqueue State UNKNOWN

Link/loopback 00:00:00:00:00:00 BRD 00:00:00:00:00:00

2:eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> MTU Qdisc pfifo_fast State up Qlen 1000

Link/ether 00:0c:29:01:bf:a0 BRD FF:FF:FF:FF:FF:FF

3:eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> MTU Qdisc pfifo_fast State up Qlen 1000

Link/ether 00:0C:29:01:BF:AA BRD FF:FF:FF:FF:FF:FF

[Email protected] ~]# IP link show eth0 ####### #查看某一块网卡信息

2:eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> MTU Qdisc pfifo_fast State up Qlen 1000

Link/ether 00:0c:29:01:bf:a0 BRD FF:FF:FF:FF:FF:FF

[[email protected] ~]# ip-s link show eth1 ######-s parameter view statistics

3:eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> MTU Qdisc pfifo_fast State up Qlen 1000

Link/ether 00:0C:29:01:BF:AA BRD FF:FF:FF:FF:FF:FF

Rx:bytes packets Errors dropped overrun Mcast

2085187 28951 0 0 0 0

Tx:bytes packets errors dropped carrier Collsns

5161 35 0 0 0 0

Example: Set

# IP Link set eth1 up|down # # # #关闭或开始某个网卡

IP addr: for managing multiple IPs

Add adds an IP

del Delete IP

Show Display IP

Flush Empty IP

Cases:

[[Email protected] ~]# IP addr Add 10.1.8.16/8 dev eth1 # # #eth1增加IP, and no aliases used

[[Email protected] ~]# IP addr

1:lo: <LOOPBACK,UP,LOWER_UP> MTU 16436 qdisc noqueue State UNKNOWN

Link/loopback 00:00:00:00:00:00 BRD 00:00:00:00:00:00

inet 127.0.0.1/8 Scope host Lo

INET6:: 1/128 Scope Host

Valid_lft Forever Preferred_lft Forever

2:eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> MTU Qdisc pfifo_fast State up Qlen 1000

Link/ether 00:0c:29:01:bf:a0 BRD FF:FF:FF:FF:FF:FF

inet 172.16.16.173/24 BRD 172.16.16.255 Scope Global eth0

Inet6 FE80::20C:29FF:FE01:BFA0/64 Scope link

Valid_lft Forever Preferred_lft Forever

3:eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> MTU Qdisc pfifo_fast State up Qlen 1000

Link/ether 00:0C:29:01:BF:AA BRD FF:FF:FF:FF:FF:FF

inet 192.168.7.173/24 BRD 192.168.7.255 Scope Global eth1

inet 10.1.8.16/8 Scope Global eth1 Note: Ifconfig not see

Inet6 FE80::20C:29FF:FE01:BFAA/64 Scope link

Valid_lft Forever Preferred_lft Forever

[[Email protected] ~]# IP addr Add 192.168.29.10/24 dev eth1 label eth1:1

Add a child card by using the Label keyword

[Email protected] ~]# ifconfig

Eth0 Link encap:ethernet HWaddr 00:0c:29:01:bf:a0

inet addr:172.16.16.173 bcast:172.16.16.255 mask:255.255.255.0

Inet6 ADDR:FE80::20C:29FF:FE01:BFA0/64 Scope:link

Up broadcast RUNNING multicast mtu:1500 metric:1

RX packets:27735 errors:0 dropped:0 overruns:0 frame:0

TX packets:549 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:1978580 (1.8 MiB) TX bytes:67070 (65.4 KiB)

eth1 Link encap:ethernet HWaddr 00:0C:29:01:BF:AA

inet addr:192.168.7.173 bcast:192.168.7.255 mask:255.255.255.0

Inet6 ADDR:FE80::20C:29FF:FE01:BFAA/64 Scope:link

Up broadcast RUNNING multicast mtu:1500 metric:1

RX packets:31549 errors:0 dropped:0 overruns:0 frame:0

TX packets:35 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:2277774 (2.1 MiB) TX bytes:5161 (5.0 KiB)

eth1:1 Link encap:ethernet HWaddr 00:0c:29:01:bf:aa

inet addr:192.168.29.10 bcast:0.0.0.0 mask:255.255.255.0

Up broadcast RUNNING multicast mtu:1500 metric:1

Lo Link encap:local Loopback

inet addr:127.0.0.1 mask:255.0.0.0

Inet6 addr::: 1/128 scope:host

Up LOOPBACK RUNNING mtu:16436 metric:1

RX packets:16 errors:0 dropped:0 overruns:0 frame:0

TX packets:16 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:0

RX bytes:960 (960.0 b) TX bytes:960 (960.0 b)

[[Email protected] ~]# IP addr del 192.168.29.10/24 dev eth1:1 # # #删除eth1:1

[Email protected] ~]# ifconfig

Eth0 Link encap:ethernet HWaddr 00:0c:29:01:bf:a0

inet addr:172.16.16.173 bcast:172.16.16.255 mask:255.255.255.0

Inet6 ADDR:FE80::20C:29FF:FE01:BFA0/64 Scope:link

Up broadcast RUNNING multicast mtu:1500 metric:1

RX packets:29138 errors:0 dropped:0 overruns:0 frame:0

TX packets:627 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:2083498 (1.9 MiB) TX bytes:76506 (74.7 KiB)

eth1 Link encap:ethernet HWaddr 00:0C:29:01:BF:AA

inet addr:192.168.7.173 bcast:192.168.7.255 mask:255.255.255.0

Inet6 ADDR:FE80::20C:29FF:FE01:BFAA/64 Scope:link

Up broadcast RUNNING multicast mtu:1500 metric:1

RX packets:32839 errors:0 dropped:0 overruns:0 frame:0

TX packets:35 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:2372722 (2.2 MiB) TX bytes:5161 (5.0 KiB)

Lo Link encap:local Loopback

inet addr:127.0.0.1 mask:255.0.0.0

Inet6 addr::: 1/128 scope:host

Up LOOPBACK RUNNING mtu:16436 metric:1

RX packets:16 errors:0 dropped:0 overruns:0 frame:0

TX packets:16 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:0

RX bytes:960 (960.0 b) TX bytes:960 (960.0 b)

[Email protected] ~]# IP addr del 10.1.8.16/8 dev eth1 # # # #删除IP

[[Email protected] ~]# IP addr Show

1:lo: <LOOPBACK,UP,LOWER_UP> MTU 16436 qdisc noqueue State UNKNOWN

Link/loopback 00:00:00:00:00:00 BRD 00:00:00:00:00:00

inet 127.0.0.1/8 Scope host Lo

INET6:: 1/128 Scope Host

Valid_lft Forever Preferred_lft Forever

2:eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> MTU Qdisc pfifo_fast State up Qlen 1000

Link/ether 00:0c:29:01:bf:a0 BRD FF:FF:FF:FF:FF:FF

inet 172.16.16.173/24 BRD 172.16.16.255 Scope Global eth0

Inet6 FE80::20C:29FF:FE01:BFA0/64 Scope link

Valid_lft Forever Preferred_lft Forever

3:eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> MTU Qdisc pfifo_fast State up Qlen 1000

Link/ether 00:0C:29:01:BF:AA BRD FF:FF:FF:FF:FF:FF

inet 192.168.7.173/24 BRD 192.168.7.255 Scope Global eth1

Inet6 FE80::20C:29FF:FE01:BFAA/64 Scope link

Valid_lft Forever Preferred_lft Forever

IP route

Show: Show routes

Add: Add route

Del: Delete route

[[Email protected] ~]# IP route show view route

192.168.7.0/24 Dev eth1 proto kernel scope link src 192.168.7.173

172.16.16.0/24 Dev eth0 proto kernel scope link src 172.16.16.173

169.254.0.0/16 Dev eth0 scope link metric 1002

10.0.0.0/8 Dev eth1 proto kernel scope link src 10.1.5.10

[[email protected] ~]# route-n View route

Kernel IP Routing Table

Destination Gateway genmask Flags Metric Ref use Iface

192.168.7.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1

172.16.16.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0

169.254.0.0 0.0.0.0 255.255.0.0 U 1002 0 0 eth0

10.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 eth1

[[Email protected] ~]# IP route add 10.0.8.0/24 via 192.168.7.1

Equivalent to: IP route add 10.0.8.0/24 dev eth1

[[Email protected] ~]# IP route Show

192.168.7.0/24 Dev eth1 proto kernel scope link src 192.168.7.173

172.16.16.0/24 Dev eth0 proto kernel scope link src 172.16.16.173

10.0.8.0/24 via 192.168.7.1 Dev eth1

169.254.0.0/16 Dev eth0 scope link metric 1002

[Email protected] ~]# IP route del 10.0.8.0/24

[Email protected] ~]# IP route show ####### #删除路由

192.168.7.0/24 Dev eth1 proto kernel scope link src 192.168.7.173

172.16.16.0/24 Dev eth0 proto kernel scope link src 172.16.16.173

169.254.0.0/16 Dev eth0 scope link metric 1002

IP rule: View default routes, policy routes, local routes

Show|list

[[Email protected] ~]# IP rule Show

0: from all lookup local

32766:from all lookup main

32767:from all lookup default

The Linux IP command