怎么查看linux是不是万兆网

查看linux是不是万兆网的方法：1、通过ethtool和lspci命令查看网卡是千兆还是万兆网卡；2、通过ifconfig命令查看机器网络端口，然后执行“sudo ethtool eno1”命令查看网络带宽是千兆还是万兆即可。

本教程操作环境：linux5.9.8系统、Dell G3电脑。

怎么查看linux是不是万兆网？

Linux查看网卡是千兆还是万兆网卡

目前用过的两个命令：

1、ethtool

ethtool 网络接口名

#ethtool em4
Settings for em4:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Speed: 1000Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 1
Transceiver: internal
Auto-negotiation: on
MDI-X: Unknown
Supports Wake-on: g
Wake-on: d
Link detected: yes

2、lspci  

当前是博通BCM5709千兆网卡Gigabit（万兆网卡显示为10-Gigabit）

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#lspci -vvv | grep Ethernet
01:00.0 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 GigabitEthernet (rev 20)
Subsystem: Dell PowerEdge R710 BCM5709 Gigabit Ethernet
Product Name: Broadcom NetXtreme II Ethernet Controller
01:00.1 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet (rev 20)
Subsystem: Dell PowerEdge R710 BCM5709 Gigabit Ethernet
Product Name: Broadcom NetXtreme II Ethernet Controller
02:00.0 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet (rev 20)
Subsystem: Dell PowerEdge R710 BCM5709 Gigabit Ethernet
Product Name: Broadcom NetXtreme II Ethernet Controller
02:00.1 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet (rev 20)
Subsystem: Dell PowerEdge R710 BCM5709 Gigabit Ethernet
Product Name: Broadcom NetXtreme II Ethernet Controller
pcilib: sysfs_read_vpd: read failed: Connection timed out

小知识：

Gigabit是数据存储的单位，通常用符号Gbit或Gb表示。它的换算公式：1 Gb = 10的9次方 bits = 1,000,000,000 bits 。

另一个常见的单位是Gibibit，gibibit是用来表示二进制换算的，1 gibibit = 2的30次方 bits = 1,073,741,824 bits。

Linux 查看网络带宽是千兆还是万兆

首先查看机器网络端口

[root@namenode ~]# ifconfig
eno1: flags=4163  mtu 1500
        inet 192.168.60.190  netmask 255.255.255.0  broadcast 192.168.80.255
        inet6 fe80::b62e:99ff:fe65:3bd6  prefixlen 64  scopeid 0x20
        ether b4:2e:99:65:3b:d6  txqueuelen 1000  (Ethernet)
        RX packets 1034361639  bytes 496433512301 (462.3 GiB)
        RX errors 0  dropped 144034  overruns 0  frame 0
        TX packets 977985340  bytes 163296216477 (152.0 GiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 16  memory 0xf7200000-f7220000

查看端口带宽(root或sudo权限)，通过下面输出可以看到speed那一行，表示千兆网。

[root@namenode ~]# sudo ethtool eno1
Settings for eno1:
    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
    Advertised link modes:  10baseT/Half 10baseT/Full 
                            100baseT/Half 100baseT/Full 
                            1000baseT/Full 
    Advertised pause frame use: No
    Advertised auto-negotiation: Yes
    Speed: 1000Mb/s
    Duplex: Full
    Port: Twisted Pair
    PHYAD: 1
    Transceiver: internal
    Auto-negotiation: on
    MDI-X: off (auto)
    Supports Wake-on: pumbg
    Wake-on: g
    Current message level: 0x00000007 (7)
                   drv probe link
    Link detected: yes

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