To check the status or the speed of your Ethernet network connection open the Terminal application. Type the following command for selected a network interface to see your current NIC speed.
How to check ethernet connection speed on the mac os x using bash command prompt
To see a list of all interfaces, enter:
ifconfig
ifconfig | more
OR
netstat -i
Sample outputs:
Name Mtu Network Address Ipkts Ierrs Opkts Oerrs Coll
lo0 16384 5385284 0 5385284 0 0
lo0 16384 localhost ::1 5385284 - 5385284 - -
lo0 16384 127 localhost 5385284 - 5385284 - -
lo0 16384 viveks-macb fe80:1::1 5385284 - 5385284 - -
en0 1500 60:03:08:94:15:7c 465184 0 620008 0 0
en1 1500 72:00:02:55:53:60 0 0 0 0 0
en2 1500 72:00:02:55:53:61 0 0 0 0 0
en6 1500 68:5b:35:c1:e0:53 337483 0 271560 0 0
en6 1500 192.168.1 wks01 337483 - 271560 - -
The syntax is:
ifconfig interfaceName | grep media
If your interface name is en1, enter:
ifconfig en1 | grep media
If your interface name is en6, enter:
ifconfig en6 | grep media
Sample outputs:
Not a CLI fan? Use network utility
Open network utility by just typing “network utility” in spotlight. You can use Network Utility to view each network connection, including the hardware address of the interface, the IP addresses assigned to it, its speed and status (active or inactive), the name of its manufacturer and model, a count of data packets sent and received, NIC speed, and a count of transmission errors and collisions.
Fig.02: How To Check Ethernet Card (en6) For Speed?
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