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Emulab FAQ: Setting Up a New Emulab: Does Emulab use NTP?

Emulab FAQ: Setting Up a New Emulab: Does Emulab use NTP?

Yes, Emulab uses NTP ([www.ntp.org/ Network Time Protocol]) to keep all of the clocks synchronized. The typical setup is for your boss node to act as a client, keeping in sync with external servers and peers. Your ops node also acts as a client (using external time servers), but also acts as a server for your experimental nodes.

The Emulab installation process creates a CNAME in your named setup files, called ntp1, which is really an alias for your ops node. In addition, all of the generic images that you get from Utah include ntp.conf files that specify ntp1 as their NTP server.