Welcome to stratum 0 ntp.remco.org
News!! Remotely monitored as of June 18th, 2008
Offset and jitter of helium, my open access pool.NTP server,
disciplined by an Oncore UT+ precision timing GPS receiver, and .. . Guzzi.
Offset and jitter of lithium. Disciplined by analogous DCF77.
The kernel PLL’s are sensitive towards my presence. Maybe I have too much intuition?.
Technical details / specifications:
Helium: LinuxPPS patched 2.6.25.6 kernel, and ntpd-4.2.5p113.
External references for helium (primary ntp server, i.e. ntp.remco.org):
GPS+PPS: Motorola Oncore UT+ timing receiver
CET (backup): DCF77 receiver module
External reference for lithium (ntp.remco.name, reachable via IPv6 only):
CET: DCF77 receiver module
History
- 2008 june 12: FreeBSD 7.0 with PPS_SYNC and Jupiter GPS is now the primary ntp server.
Stats can be viewed here. - 2008 june 07: lithium has one DCF77 receiver but two drivers. GENERIC (DCFa) and radioclkd2 (DCFb).
- 2008 may 02: switched to LinuxPPS *and* low level IRQ patched kernel 2.6.25.1
- 2008 apr 16: switched to Motorola Oncore UT+ timing receiver for helium and back to LinuxPPS
- 2008 mar 24: changed reference for lithium from CET (DCF77) to GMT (MSF60)
- 2008 mar 23: upgraded to ntpd-dev-4.2.5p113, and switched to shmpps (refid GPPS)
- 2008 feb 28: reconnected Jupiter Rockwell GPS (refid GPPS)
- 2008 feb 23: connected Rubidium standard (refid Rb87)
- 2008 feb 21: added traffic stats (packets/sec)
- 2008 feb 18: ntp packets have minimal delay in HTB (”wondershaper“) queues:
# NTP (UDP protocol 17, port 123):
tc filter add dev $DEV parent 1:0 protocol ip prio 10 u32 \
match udp dst 123 0xffff \
match ip protocol 17 0xff flowid 1:10