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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