Swedish Distributed Time Service - Operational Status

2023-03-14 04:34 - 13:38 UTC

  • At 04:34 UTC on the 14th of March one of the caesium clocks in one of our Stockholm nodes failed. This resulted in the time distribution of sth1 being degraded. At most the time distribution was incorrect by 11.97ms. Issue has been resolved as of 13:38 UTC.

2022-10-22 20:46 UTC, finished 2022-10-23 02:05 UTC

  • Problems with one of 6 PTP distribution units in Stockholm. Equipment replaced

2022-10-05 18.30 UTC and for 2 hours

  • Cesium clock 0 in Stockholm node replaced. Time dissemination not affected.

2022-09-21 22:00 UTC and for 2 hours

  • Planned maintenance work with the router infrastructure in Luleå (lul1 & lul2). Occasional interruptions in the Unicast NTP service from Luleå might occur.

2022-09-13 21:00 UTC

  • Internal ethernet switch in Malmö node down, will be replaced 2022-09-14. Time dissemination not affected.

2022-09-05 13:00 UTC and for 2 hours

  • One PTP grandmaster in Stockholm node has internal problems. Restarted on very short notice, firmware updating and testing was done. Three customers affected.

2022-08-14 18:00 UTC and for 1 hour

  • Replacement of HROG 1 in Stockholm node. Time dissemination not affected.

2022-06-08 06:15 - 16:00 UTC

  • Unplanned downtime for unicast NTP in Luleå. Interruption of the unicast NTP service in Luleå has been observable since 2022-06-08, 06:15 UTC. This has no impact on our anycast NTP and PTP services in Luleå which are running normally. Issue has been resolved as of 16:00 UTC.

2022-04-11 00:01 UTC and for 1 hour

  • Planned maintenance work with the router infrastructure in Sundsvall (svl1 & svl2). Occasional interruptions in the Unicast NTP service from Sundsvall might occur.

2022-04-10 23:01 UTC and for 1 hour

  • Planned maintenance work with the router infrastructure in Gothenburg (gbg1 & gbg2). Occasional interruptions in the Unicast NTP service from Gothenburg might occur.

2022-04-10 22:01 UTC and for 1 hour

  • Planned maintenance work with the router infrastructure in Malmö (mmo1 & mmo2). Occasional interruptions in the Unicast NTP service from Malmö might occur.

2022-03-26 21:23 - 21:30 UTC

  • Unplanned downtime for unicast NTP in Malmö (mmo1 & mmo2). Occasional interruptions in the unicast NTP service were observable between 2022-03-26 21:23 - 21:30 UTC. There was no effect on our Anycast NTP.

2022-03-14

  • GNSS receiver in GBG repaired. Node no longer in holdover. Time scale precision was not affected.

2022-02-24 13:00 UTC

  • The NTS timestamping servers for sth1.nts.netnod.se and sth2.nts.netnod.se are now using Netnod's FPGA implementation running on Arista 7130 hardware.

2022-02-22 

  • GNSS receiver in GBG non-functional, node in holdover mode. Node will still fulfil PRTC requirements.
     

2022-02-21

  • NTS up and running on with Netnod's FPGA implementation on lab1.sth.netnod.se and  lab2.sth.netnod.se.  Note, this is a lab setup intended for interoperability testing and could break without warning.  Do not use it for anything important.

2021-05-11 22:00 UTC and for 6 hours

  • Planned maintenance work with the router infrastructure in Stockholm (STH3 & STH4). Occasional interruptions in the NTP service from Stockholm might occur.

2021-05-10 22:00 UTC and for 6 hours

  • Planned maintenance work with the router infrastructure in Stockholm (STH1 & STH2). Occasional interruptions in the NTP service from Stockholm might occur.

2021-05-05 00:00 UTC and for 1 hours

  • Planned maintenance work with the router infrastructure in Gothenburg (GBG1 & GBG2). Occasional interruptions in the NTP service from Gothenburg might occur.

2021-05-05 23:00 UTC and for 1 hours

  • Planned maintenance work with the router infrastructure in Malmö (mmo1 & mmo2). Occasional interruptions in the NTP service from Malmö might occur.

2021-05-05 22:00 UTC and for 1 hours

  • Planned maintenance work with the router infrastructure in Sundsvall (svl1 & svl2). Occasional interruptions in the NTP service from Sundsvall might occur.

2019-09-24 16:00 UTC and for 8 hours

  • Planned maintenance work with the router infrastructure in Sundsvall (svl). Occasional interruptions in the NTP service from Sundsvall may occur.

2019-06-12 16:00 UTC and for 10 hours

  • Planned maintenance work with the router infrastructure in Gothenburg (gbg). Occasional interruptions in the NTP service from Gothenburg may occur.

2019-05-14 15:00 UTC and for 5 hours

  • Planned maintenance work with the router infrastructure in Malmö (mmo). Occasional interruptions in the NTP service may occur.

2019-02-27 20:00 - 21:00 UTC

  • Routing problem made sth1.ntp.se and sth2.ntp.se unreachable over IPv4, addresses 194.58.202.20 & 194.58.202.148.

2018-12-05 23:05 UTC and for 5 hours

  • Planned maintenance work with the router infrastructure in Stockholm. Occasional interruptions in the NTP service may occur.

2016-04-04

  • Decomissioned old servers in Stockholm, Gothenburg and Malmö; move old addresses to new servers (ntp[12].{sth|gbg|mmo}.netnod.se).

2015-12-31

  • Decomissioned old server ntp1 in Stockholm (ntp1.sth....), took over old address on the new server