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

语法：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）

#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：

1、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 。 2、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。