Re: [ntp:questions] Accuracy of GPS device

2011-10-18 Thread unruh
On 2011-09-01, Miguel Gon?alves m...@miguelgoncalves.com wrote: Hi! Thanks for your reply. My comments bellow. On 1 September 2011 18:24, unruh un...@wormhole.physics.ubc.ca wrote: On 2011-09-01, Miguel Gon?alves m...@miguelgoncalves.com wrote: Hi all! I have two internal FreeBSD with

Re: [ntp:questions] Accuracy of GPS device

2011-09-02 Thread Miguel Gonçalves
On 2 September 2011 07:56, unruh un...@wormhole.physics.ubc.ca wrote: Nope. It is completely unclear to me what your question is. Your 10.0.2.254 is an outside switch. I had several questions in my first message. Your assumption is wrong. You are telling me that a switch I installed in my

Re: [ntp:questions] Accuracy of GPS device

2011-09-02 Thread Miroslav Lichvar
On Fri, Sep 02, 2011 at 09:50:05AM +0100, Miguel Gonçalves wrote: I found out the problem and just for the record I'll explain... The offset is larger than the delay because NTPd is using 10.0.2.254 (more on this switch later) as a time source and it shouldn't because it has two local

Re: [ntp:questions] Accuracy of GPS device

2011-09-02 Thread Dave Hart
2011/9/2 Miguel Gonçalves m...@miguelgoncalves.com: $ ntpq -p 10.0.2.2; ntpdc -c kerninfo 10.0.2.2     remote           refid      st t when poll reach   delay   offset  jitter == +10.0.2.10       .GPS.            1 u

Re: [ntp:questions] Accuracy of GPS device

2011-09-02 Thread unruh
On 2011-09-02, Miguel Gon?alves m...@miguelgoncalves.com wrote: On 2 September 2011 07:56, unruh un...@wormhole.physics.ubc.ca wrote: Nope. It is completely unclear to me what your question is. Your 10.0.2.254 is an outside switch. I had several questions in my first message. Your

Re: [ntp:questions] Accuracy of GPS device

2011-09-02 Thread unruh
On 2011-09-02, Miguel Gon?alves m...@miguelgoncalves.com wrote: Very good point really. This is probably why the FreeBSD machine performs better than the Linux one. The FreeBSD is embedded and doesn't produce a lot of heat while the Linux one is a Dell regular server. Perhaps removing the lid

[ntp:questions] Accuracy of GPS device

2011-09-01 Thread Miguel Gonçalves
Hi all! I have two internal FreeBSD with GPS receivers attached (Garmin 18 LVC: 10.0.2.10 / Sure Evaluation Board:10.0.2.9). Both machines are on the same LAN segment (VLAN). For redundancy, I've configured a Cisco switch as a stratum 2 server. Here's the relevant information: $ ntpq -pcrv

Re: [ntp:questions] Accuracy of GPS device

2011-09-01 Thread unruh
On 2011-09-01, Miguel Gon?alves m...@miguelgoncalves.com wrote: Hi all! I have two internal FreeBSD with GPS receivers attached (Garmin 18 LVC: 10.0.2.10 / Sure Evaluation Board:10.0.2.9). Both machines are on the same LAN segment (VLAN). For redundancy, I've configured a Cisco switch as a

Re: [ntp:questions] Accuracy of GPS device

2011-09-01 Thread David Woolley
Miguel Gonçalves wrote: Are my GPS clocks OK? Does this happen due to the network latency? Are my stratum 2 servers OK? They are well within the allowable error bands, given the measured root delay. That's about all one can say. as the error bands are about +/- 32 ms! The delays are due

Re: [ntp:questions] Accuracy of GPS device

2011-09-01 Thread Miguel Gonçalves
Hi! Thanks for your reply. My comments bellow. On 1 September 2011 18:24, unruh un...@wormhole.physics.ubc.ca wrote: On 2011-09-01, Miguel Gon?alves m...@miguelgoncalves.com wrote: Hi all! I have two internal FreeBSD with GPS receivers attached (Garmin 18 LVC: 10.0.2.10 / Sure

Re: [ntp:questions] Accuracy of GPS device

2011-09-01 Thread E-Mail Sent to this address will be added to the BlackLists
Miguel Gonçalves m...@miguelgoncalves.com wrote: unruh un...@wormhole.physics.ubc.ca wrote: Miguel Gonçalves m...@miguelgoncalves.com wrote: ... For redundancy, I've configured a Cisco switch as a stratum 2 server. Here's the relevant information: $ ntpq -pcrv 10.0.2.254 remote

Re: [ntp:questions] Accuracy of GPS device

2011-09-01 Thread unruh
On 2011-09-01, Miguel Gon?alves m...@miguelgoncalves.com wrote: Hi! Thanks for your reply. My comments bellow. On 1 September 2011 18:24, unruh un...@wormhole.physics.ubc.ca wrote: On 2011-09-01, Miguel Gon?alves m...@miguelgoncalves.com wrote: Hi all! I have two internal FreeBSD with