title: Linux设置网口速率
date: 2022-03-15 18:05:25.0
updated: 2022-03-15 18:25:35.0
url: https://liumou.site/doc/287
categories:

1、查看当前网口速率

1.1、查询网卡名称

执行下面的命令

nmcli device

然后找到已连接的设备名称

gxxc@TD-ZW:~$ nmcli device 
DEVICE      TYPE      STATE   CONNECTION 
enp125s0f1  ethernet  已连接  zb         
enp125s0f0  ethernet  不可用  --         
ip6tnl0     iptunnel  未托管  --         
lo          loopback  未托管  --         
gxxc@TD-ZW:~$

例如这里是: enp125s0f1

1.2、查询网口速率

获取到网卡名称之后，通过查询语法可以查询该网卡的速率

1.2.1、查询语法

然后使用下面的语法进行查询

ethtool <网卡名>

1.2.2、实践

gxxc@TD-ZW:~$ ethtool enp125s0f1
Settings for enp125s0f1:
    Supported ports: [ TP ]
    Supported link modes:   10baseT/Half 10baseT/Full 
                            100baseT/Half 100baseT/Full 
                            1000baseT/Full 
    Supported pause frame use: Symmetric Receive-only
    Supports auto-negotiation: Yes
    Supported FEC modes: Not reported
    Advertised link modes:  100baseT/Full 
    Advertised pause frame use: Symmetric Receive-only
    Advertised auto-negotiation: No
    Advertised FEC modes: Not reported
    Speed: 100Mb/s
    Duplex: Full
    Port: MII
    PHYAD: 1
    Transceiver: internal
    Auto-negotiation: off
Cannot get wake-on-lan settings: Operation not permitted
    Current message level: 0x00000036 (54)
                   probe link ifdown ifup
    Link detected: yes
gxxc@TD-ZW:~$

此时可以看到,在Speed值那里显示: 100Mb/s，也就是目前是百兆网络