nanog mailing list archives
Re: Picking outside NTP servers (Re: NTP Issues Today)
From: "Majdi S. Abbas" <msa () latt net>
Date: Tue, 20 Nov 2012 18:22:35 -0500
On Tue, Nov 20, 2012 at 04:53:39PM -0500, Jay Ashworth wrote:
For myself, I usually pick the first three in us.pool.ntp.org, tick and tock, time.nist.gov, and a couple of regionally appropriate large universities.
I'd advise going through the RR for a while, and pick servers close to you. ntpd won't select a server that's more than 128ms away. It also degrades accuracy. Select for minimum latency, as well as a diverse set of sources. [Watch their refid over time, and make sure they aren't slaving to the same set of servers, as well as others you may be using.] It requires a bit of effort, but over time you get an idea what public time servers are close to each of your locations, and diverse from each other. --msa
Current thread:
- Re: NTP Issues Today, (continued)
- Re: NTP Issues Today Leo Bicknell (Nov 20)
- Re: NTP Issues Today Jay Ashworth (Nov 20)
- Re: NTP Issues Today Jared Mauch (Nov 20)
- Re: NTP Issues Today George Herbert (Nov 20)
- Re: NTP Issues Today Leo Bicknell (Nov 20)
- Re: NTP Issues Today Darius Jahandarie (Nov 20)
- Re: NTP Issues Today Mike Lyon (Nov 20)
- Re: NTP Issues Today Jared Mauch (Nov 20)
- Picking outside NTP servers (Re: NTP Issues Today) Jay Ashworth (Nov 20)
- Re: Picking outside NTP servers (Re: NTP Issues Today) George Herbert (Nov 20)
- Re: Picking outside NTP servers (Re: NTP Issues Today) Majdi S. Abbas (Nov 20)
- Re: NTP Issues Today Leo Bicknell (Nov 20)
- Re: NTP Issues Today Ask Bjørn Hansen (Nov 21)
- Re: NTP Issues Today Darius Jahandarie (Nov 20)
- Re: NTP Issues Today Blake Dunlap (Nov 20)
- Re: NTP Issues Today George Herbert (Nov 20)
- Re: NTP Issues Today Robert E. Seastrom (Nov 21)
- Re: NTP Issues Today Greg Ihnen (Nov 21)