标签:00 Full 网线 lft link ff Linux 服务器 ens33
1.获得网卡名
使用命令ip a获取到3个网卡,lo为本地回环,ens33和ens37为2块网卡的网卡名
[20:44:20 root@centos8 ~]#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 fq_codel state UP group default qlen 1000
link/ether 00:0c:29:df:05:a1 brd ff:ff:ff:ff:ff:ff
inet 192.168.31.157/24 brd 192.168.31.255 scope global dynamic noprefixroute ens33
valid_lft 1386sec preferred_lft 1386sec
inet6 fe80::20c:29ff:fedf:5a1/64 scope link noprefixroute
valid_lft forever preferred_lft forever
3: ens37: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
link/ether 00:0c:29:df:05:ab brd ff:ff:ff:ff:ff:ff
2.查看网线是否连接
方法1:
使用mii-tools 网卡名
[20:41:57 root@centos8 ~]#mii-tool ens37
ens37: no link
[20:42:04 root@centos8 ~]#mii-tool ens33
ens33: negotiated 1000baseT-FD flow-control, link ok
方法2:
使用ethtool命令,查看最后一行Link detected: 值,yes为已连通,no为未连接
[20:34:30 root@centos8 ~]#ethtool ens33
Settings for ens33:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Supported FEC modes: Not reported
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Speed: 1000Mb/s
Duplex: Full
Auto-negotiation: on
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
MDI-X: off (auto)
Supports Wake-on: d
Wake-on: d
Current message level: 0x00000007 (7)
drv probe link
Link detected: yes
不通的是
[20:44:11 root@centos8 ~]#ethtool ens37
Settings for ens37:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Supported FEC modes: Not reported
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Speed: Unknown!
Duplex: Unknown! (255)
Auto-negotiation: on
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
MDI-X: Unknown (auto)
Supports Wake-on: d
Wake-on: d
Current message level: 0x00000007 (7)
drv probe link
Link detected: no
方法3:
其实看网卡名的时候仔细的话也能发现网卡状态的区别
state UP
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:0c:29:df:05:a1 brd ff:ff:ff:ff:ff:ff
inet 192.168.31.157/24 brd 192.168.31.255 scope global dynamic noprefixroute ens33
valid_lft 1386sec preferred_lft 1386sec
inet6 fe80::20c:29ff:fedf:5a1/64 scope link noprefixroute
valid_lft forever preferred_lft forever
state DOWN
3: ens37: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
link/ether 00:0c:29:df:05:ab brd ff:ff:ff:ff:ff:ff
标签:00,Full,网线,lft,link,ff,Linux,服务器,ens33 来源: https://blog.csdn.net/qq_29974229/article/details/118784073
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