Your Linux Data Center Experts

A few weeks ago we ran into a situation where two machines ended up on the same IP address, on machines an hour away, despite testing which was done before leaving. Worse, the duplicated IP was on the system management console, so this was the only way into the machine, an OS had not yet been installed. Knowing how ARP works can allow you to work around a situation like this, so I wrote an article about it: Networking Basics: How ARP Works.

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