Speaking of GPS-enabled NTP appliances, etc. wondering what hardware people are using for this. thanks -----Original Message----- From: "Raymond Burkholder" <ray@oneunified.net> Sent: Saturday, December 29, 2018 12:01pm To: "Matthew Huff" <mhuff@ox.com>, "list@satchell.net" <list@satchell.net>, "nanog@nanog.org" <nanog@nanog.org> Subject: Re: CenturyLink On 2018-12-29 7:51 a.m., Matthew Huff wrote:
We have two stratum-1 servers synced with GPS and a PTP feed from a provider that also provides PTP to market data systems, but we still have to monitor drift between system time and NIST time. Don't ask for the logic behind it, it's a regulation, not a technical requirement.
On one occasion, due to bad firmware or a configuration issue, I have seen GPS stratum 1 diverge from NTP. It was somewhat eye brow raising to the company. My NTP monitored servers were shown to be diverging their GPS/NTP, but after looking at twice or thrice, it was the other way around.