How to check if linux is 10Gb network

How to check whether Linux is a 10G network card: 1. Use the ethtool and lspci commands to check whether the network card is a Gigabit or 10G network card; 2. Use the ifconfig command to check the machine network port, and then execute "sudo ethtool eno1" Just run the command to check whether the network bandwidth is Gigabit or 10 Gigabit.

#The operating environment of this tutorial: linux5.9.8 system, Dell G3 computer.

How to check if Linux is a 10G network?

Linux Check whether the network card is a Gigabit or 10 Gigabit network card

Two commands used so far:

1, ethtool

ethtool network interface name

#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

Currently it is Broadcom BCM5709 Gigabit network card Gigabit (10 Gigabit network card is displayed as 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

Small Knowledge:

Gigabit is the unit of data storage, usually represented by the symbol Gbit or Gb. Its conversion formula: 1 Gb = 10 to the 9th power bits = 1,000,000,000 bits.

Another common unit is Gibibit. Gibibit is used to represent binary conversion. 1 gibibit = 2 to the 30th power bits = 1,073,741,824 bits.

Linux Check whether the network bandwidth is Gigabit or 10 Gigabit

First check the machine network port

[root@namenode ~]# ifconfig
eno1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  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

Check the port bandwidth (root or sudo permissions), Through the output below, you can see the speed line, which represents Gigabit network.

[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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