Re: CenturyLink

[Luke Guillory <lguillory () reservetele com>]

We have a few s600’s deployed as well, rock solid and van handle 10k+ queries a second.


ns



Sent from my iPhone

On Dec 30, 2018, at 11:22 AM, Matthew Huff <mhuff () ox com<mailto:mhuff () ox com>> wrote:

We use an older model of 
https://www.microsemi.com/product-directory/enterprise-network-time-servers/4117-syncserver-s600 with rubidium 
oscillator. Not cheap, but hardened and extremely accurate.

----
Matthew Huff             | 1 Manhattanville Rd
Director of Operations   | Purchase, NY 10577
OTA Management LLC       | Phone: 914-460-4039

From: Shawn L [mailto:shawnl () up net]
Sent: Sunday, December 30, 2018 9:40 AM
To: nanog () nanog org<mailto:nanog () nanog org>
Cc: Matthew Huff <mhuff () ox com<mailto:mhuff () ox com>>; list () satchell net<mailto:list () satchell net>
Subject: Re: CenturyLink


Speaking of GPS-enabled NTP appliances, etc. wondering what hardware people are using for this.



thanks






-----Original Message-----
From: "Raymond Burkholder" <ray () oneunified net<mailto:ray () oneunified net>>
Sent: Saturday, December 29, 2018 12:01pm
To: "Matthew Huff" <mhuff () ox com<mailto:mhuff () ox com>>, "list () satchell net<mailto:list () satchell net>" <list 
() satchell net<mailto:list () satchell net>>, "nanog () nanog org<mailto:nanog () nanog org>" <nanog () nanog 
org<mailto: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.