[root@localhost ~]# ip address show 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 00:0c:29:28:0f:b1 brd ff:ff:ff:ff:ff:ff inet 192.168.41.100/24 brd 192.168.41.255 scope global noprefixroute ens33 valid_lft forever preferred_lft forever inet6 fe80::101b:ff83:d95:16/64 scope link noprefixroute valid_lft forever preferred_lft forever
指定设备ens33
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ip link show dev ens33
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[root@localhost ~]# ip link show dev ens33 2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000 link/ether 00:0c:29:28:0f:b1 brd ff:ff:ff:ff:ff:ff
显示详细的数据包收发信息
加-s参数
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ip -s link show dev ens33
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[root@localhost ~]# ip -s link show dev ens33 2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000 link/ether 00:0c:29:28:0f:b1 brd ff:ff:ff:ff:ff:ff RX: bytes packets errors dropped overrun mcast 625634 8994 0 0 0 0 TX: bytes packets errors dropped carrier collsns 5411590 16327 0 0 0 0
[root@localhost ~]# ip address add 192.168.41.132/24 dev ens33 您在 /var/spool/mail/root 中有新邮件 [root@localhost ~]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 00:0c:29:28:0f:b1 brd ff:ff:ff:ff:ff:ff inet 192.168.41.100/24 brd 192.168.41.255 scope global noprefixroute ens33 valid_lft forever preferred_lft forever inet 192.168.41.132/24 scope global secondary ens33 valid_lft forever preferred_lft forever inet6 fe80::101b:ff83:d95:16/64 scope link noprefixroute valid_lft forever preferred_lft forever [root@localhost ~]# ping 192.168.41.132 PING 192.168.41.132 (192.168.41.132) 56(84) bytes of data. 64 bytes from 192.168.41.132: icmp_seq=1 ttl=64 time=0.030 ms 64 bytes from 192.168.41.132: icmp_seq=2 ttl=64 time=0.036 ms ^C --- 192.168.41.132 ping statistics --- 2 packets transmitted, 2 received, 0% packet loss, time 999ms rtt min/avg/max/mdev = 0.030/0.033/0.036/0.003 ms
ping 添加的ip发现可以ping通!
使用label参数还可以给添加的ip添加别名
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ip address add 192.168.41.133/24 dev ens33 label ens33:1
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[root@localhost ~]# ip address add 192.168.41.133/24 dev ens33 label ens33:1 [root@localhost ~]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 00:0c:29:28:0f:b1 brd ff:ff:ff:ff:ff:ff inet 192.168.41.100/24 brd 192.168.41.255 scope global noprefixroute ens33 valid_lft forever preferred_lft forever inet 192.168.41.132/24 scope global secondary ens33 valid_lft forever preferred_lft forever inet 192.168.41.133/24 scope global secondary ens33:1 valid_lft forever preferred_lft forever inet6 fe80::101b:ff83:d95:16/64 scope link noprefixroute valid_lft forever preferred_lft forever
通过ip命令查看路由表
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ip route
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[root@localhost ~]# ip route default via 192.168.41.2 dev ens33 proto static metric 100 192.168.41.0/24 dev ens33 proto kernel scope link src 192.168.41.100 metric 100
ip检查arp缓存
显示网络邻居信息
检查MAC地址信息
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ip neighbour
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[root@localhost ~]# ip neighbour 192.168.41.2 dev ens33 lladdr 00:50:56:fb:e5:4c STALE 192.168.41.1 dev ens33 lladdr 00:50:56:c0:00:08 REACHABLE
还可以直接通过arp命令查看arp缓存
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arp
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[root@localhost ~]# arp Address HWtype HWaddress Flags Mask Iface gateway ether 00:50:56:fb:e5:4c C ens33 192.168.41.1 ether 00:50:56:c0:00:08 C ens33
取消主机名解析
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arp -n
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[root@localhost ~]# arp -n Address HWtype HWaddress Flags Mask Iface 192.168.41.2 ether 00:50:56:fb:e5:4c C ens33 192.168.41.1 ether 00:50:56:c0:00:08 C ens33