<div>
If you have console access you can run 'system-config-network'.<br />
<br />
CLI 'netstat -ni' will show active interfaces.<br />
<br />
Or you can see if traffic is passing through a NIC, 'tcpdump -i eth0'<br />
<br />
Then check the NIC lights on the back to determine the ordering (left to right or right to left) if they are not marked.
</div>


If you have console access you can run 'system-config-network'.

CLI 'netstat -ni' will show active interfaces.

Or you can see if traffic is passing through a NIC, 'tcpdump -i eth0'

Then check the NIC lights on the back to determine the ordering (left to right or right to left) if they are not marked.

<div>
Sweet, had no idea that ethtool was there.
</div>


Sweet, had no idea that ethtool was there.

<div>
Sometimes (depending on the module in use) ethtool won't work. For that try mii-tool<br />
<br />
ie<br />
eth0: negotiated 100baseTx-FD flow-control, link ok
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Sometimes (depending on the module in use) ethtool won't work. For that try mii-tool

ie
eth0: negotiated 100baseTx-FD flow-control, link ok

<div>
I find the output of mii-tool easier to read<br />
<br />
mii-tool<br />
<br />
and if you want full details<br />
<br />
mii-tool -v<br />
<br />

</div>


I find the output of mii-tool easier to read

mii-tool

and if you want full details

mii-tool -v



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<div class="content wysiwyg-content">
Running Linux distro I think RH9 with VMWare ESX 3.1 server.<br />
<br />
I have 4 NICs in this server, how can I tell which one is which? &nbsp;Is there a command that will tell me the link status. &nbsp;I've tried ifconfig and netstat but neither will tell me if the link is up or down. &nbsp;What I was going to do is just unplug each one at a time and see which loses connectivity and then I'd know which is which.<br />
<br />
Maybe there's an easier way.....<br />
<br />
Thank you in advance,<br />
Tom
</div>
</div>


Running Linux distro I think RH9 with VMWare ESX 3.1 server.

I have 4 NICs in this server, how can I tell which one is which?  Is there a command that will tell me the link status.  I've tried ifconfig and netstat but neither will tell me if the link is up or down.  What I was going to do is just unplug each one at a time and see which loses connectivity and then I'd know which is which.

Maybe there's an easier way.....

Thank you in advance,
Tom

Linux determine which NIC has connectivity or not.

Linux is a UNIX-like open source operating system with hundreds of distinct distributions, including: Fedora, openSUSE, Ubuntu, Debian, Slackware, Gentoo, CentOS, and Arch Linux. Linux is generally associated with web and database servers, but has become popular in many niche industries and applications.

Linux

A Linux distribution is an operating system made as a software collection based on the Linux kernel and, often, on a package management system and are available for a variety of systems. A typical Linux distribution comprises a Linux kernel, GNU tools and libraries, additional software, documentation, a window system (the most common being the X Window System), a window manager, and a desktop environment. Most Linux systems are open-source software made available both as compiled binaries and in source code form, allowing modifications to the original software. Over three hundred distributions are in active development, including commercially backed distributions (such as Fedora, openSUSE and Ubuntu) and community-driven distributions (such as Debian, Slackware, Gentoo and Arch Linux).

Linux Distributions

The variety of Linux distributions creates myriad issues relating to configuration and operations when computers are networked, not the least of which is the use of various network management applications, some of which are included with specific distributions, while others are standalone applications.