nanog mailing list archives

RE: NTP Server


From: Brandon Kim <brandon.kim () brandontek com>
Date: Sun, 24 Oct 2010 12:26:52 -0400


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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