Wow that is amazing and quite impressive that you even run the antenna lines....interesting......do you have to pay for the GPS service?

Subject: Re: NTP Server To: brandon.kim@brandontek.com From: jkrejci@usinternet.com Date: Sun, 24 Oct 2010 15:52:03 +0000

Internet ntp is not as reliable as local ntp due to either reachability or tampering. We run a pair of GPS ntp servers with antennas ran to the roof of the building. We make them available to our customers as well as for our own use.

------Original Message------ From: Brandon Kim To: nanog@nanog.org Subject: NTP Server Sent: Oct 24, 2010 10:34 AM

Hey guys:

I wanted to open up this question regarding NTP server. I recalled someone had created a posting of this quite awhile back.

...

From a service provider/ISP standpoint, does anyone think that having a local NTP server is really necessary?

I've asked some of my fellow engineers at work and many of them gives me the same response, "Can't we just use free ones out on the internet?"

1) How necessary do you believe in local NTP servers? Do you really need the logs to be perfectly accurate? 2) If you do have a local NTP server, is it only for local internal use, or do you provide this NTP server to your clients as an added service? 3) If you do have a local NTP server, do you have a standby local NTP server or do you use the internet as your standby server?

Thoughts?

Thanks in advance, and this list is such a valuable wealth of resource....

Brandon

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