查看linux是不是萬兆網的方法：1、通過ethtool和lspci命令查看網卡是千兆還是萬兆網卡；2、通過ifconfig命令查看機器網絡端口，然后執行“sudo ethtool eno1”命令查看網絡帶寬是千兆還是萬兆即可。
本教程操作環境：linux5.9.8系統、Dell G3電腦。
怎么查看linux是不是萬兆網？
Linux查看網卡是千兆還是萬兆網卡
目前用過的兩個命令：
1、ethtool
ethtool 網絡接口名
#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??
當前是博通BCM5709千兆網卡Gigabit（萬兆網卡顯示為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
小知識：
Gigabit是數據存儲的單位，通常用符號Gbit或Gb表示。它的換算公式：1 Gb = 10的9次方 bits = 1,000,000,000 bits 。
另一個常見的單位是Gibibit，gibibit是用來表示二進制換算的，1 gibibit = 2的30次方 bits = 1,073,741,824 bits。
Linux 查看網絡帶寬是千兆還是萬兆
首先查看機器網絡端口
[root@namenode?~]#?ifconfig eno1:?flags=4163<up>??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<link> ????????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</up>
查看端口帶寬(root或sudo權限)，通過下面輸出可以看到speed那一行，表示千兆網。
[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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