If you wish to check the speed of network interfaces on a CentOS Linux system, if the nm-tool utility, is installed, then you can use it to determine the speed of the network ports.
$ nm-tool NetworkManager Tool State: disconnected - Device: em1 ------------------------------------------------------------------ Type: Wired Driver: bnx2 State: unmanaged Default: no HW Address: D4:AE:52:CD:0A:D4 Capabilities: Carrier Detect: yes Speed: 1000 Mb/s Wired Properties Carrier: on - Device: em2 ------------------------------------------------------------------ Type: Wired Driver: bnx2 State: unmanaged Default: no HW Address: D4:AE:52:CD:0A:D5 Capabilities: Carrier Detect: yes Wired Properties Carrier: off $
If it is installed, the nm-tool program will likely be in /usr/bin
. It is part of the NetworkManager package.
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