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.
---- Matthew Huff | 1 Manhattanville Rd Director of Operations | Purchase, NY 10577 OTA Management LLC | Phone: 914-460-4039 -----Original Message----- From: NANOG [mailto:nanog-boun...@nanog.org] On Behalf Of Stephen Satchell Sent: Saturday, December 29, 2018 9:34 AM To: nanog@nanog.org Subject: Re: CenturyLink On 12/28/18 3:23 PM, Yang Yu wrote: > On Fri, Dec 28, 2018 at 12:05 AM Stephane Bortzmeyer <bortzme...@nic.fr> > wrote: >> Is this problem also responsible for the 911 outage? If so, the >> post-mortem analysis is not useful only for CenturyLink customers but >> for everyone on the west coast. > > Looks like most time.nist.gov servers (3 x NIST sites on AS49) are > single homed on CenturyLink, anyone noticed NTP issues yesterday? > > https://tf.nist.gov/tf-cgi/servers.cgi > I have GPS-based Stratum 1 NTP appliances in my network, so I wouldn't see any issues. I suspect many other operators are in the same situation.
