Re: [ntp:questions] IEEE 1588 (PTP) at the nanosecond level?

[Martin Burnicki]

E-Mail Sent to this address will be added to the BlackLists schrieb:

Martin Burnicki wrote:

Magnus Danielson wrote:

Indeed. If you read the right article from 1990 you
  also know you can do it on L1 C/A only by monitoring
  both code and carrier phase, as their ionospheric
  effect have opposite signs.


That's interesting, and I didn't know about this.

Do you have a pointer to this article?








Thanks for the links. Very interesting stuff.


Martin
--
Martin Burnicki

Meinberg Funkuhren
Bad Pyrmont
Germany

___
questions mailing list
questions@lists.ntp.org
http://lists.ntp.org/listinfo/questions

[ntp:questions] Problem facing with Ntp client Configuration

[Biswajit Panigrahi]

Hi All,
When ever I configure ntp client ,then its takes more time even if 7minute to 8 
minute difference is there between client and server.
Please provide me the configuration which will sync within less time.
Currently ntp.drift file is empty.shall we need to modify the same?

Current NTP Client configuration is :

server 10.16.188.254
server 127.127.1.0
fudge 127.127.1.0 stratum 10

restrict 10.16.188.254 mask 255.255.255.255 nomodify notrap noquery
restrict 127.0.0.1

broadcastclient novolley
broadcastdelay 0
keys /var/ntp/keys

logfile /var/log/ntp/ntpd.log
driftfile /var/log/ntp/ntp.drift
statsdir /var/log/ntp/
statistics loopstats peerstats
filegen loopstats file loopstats type day enable
filegen peerstats file peerstats type day enable




Disclaimer:  This message and the information contained herein is proprietary 
and confidential and subject to the Tech Mahindra policy statement, you may 
review the policy at http://www.techmahindra.com/Disclaimer.html externally 
http://tim.techmahindra.com/tim/disclaimer.html internally within TechMahindra.


___
questions mailing list
questions@lists.ntp.org
http://lists.ntp.org/listinfo/questions

Re: [ntp:questions] Problem facing with Ntp client Configuration

[David Lord]

Biswajit Panigrahi wrote:

Hi All,
When ever I configure ntp client ,then its takes more time even if 7minute to 8 
minute difference is there between client and server.
Please provide me the configuration which will sync within less time.
Currently ntp.drift file is empty.shall we need to modify the same?


My ntpd startup scripts still use "ntpdate" to preset the time
but you can also try "ntpd -g -q".

The drift file is only populated when ntpd has an idea of what
the value should be.

When using a good drift file my servers are usually within 1 ms
offset after about 15 minutes (ntpd 4.2.7p433).


David




Current NTP Client configuration is :

server 10.16.188.254
server 127.127.1.0
fudge 127.127.1.0 stratum 10

restrict 10.16.188.254 mask 255.255.255.255 nomodify notrap noquery
restrict 127.0.0.1

broadcastclient novolley
broadcastdelay 0
keys /var/ntp/keys

logfile /var/log/ntp/ntpd.log
driftfile /var/log/ntp/ntp.drift
statsdir /var/log/ntp/
statistics loopstats peerstats
filegen loopstats file loopstats type day enable
filegen peerstats file peerstats type day enable




Disclaimer:  This message and the information contained herein is proprietary 
and confidential and subject to the Tech Mahindra policy statement, you may 
review the policy at http://www.techmahindra.com/Disclaimer.html externally 
http://tim.techmahindra.com/tim/disclaimer.html internally within TechMahindra.



___
questions mailing list
questions@lists.ntp.org
http://lists.ntp.org/listinfo/questions

[ntp:questions] UK MSF outages - Monday 14 April to Thursday 1 May 2014 (inclusive)

[David Taylor]

UK MSF outages - see:


http://www.npl.co.uk/science-technology/time-frequency/products-and-services/time/msf-outages

__
Annual maintenance work - signal off-air

The annual maintenance period for the Anthorn site will be from Monday 
14 April to Thursday 1 May 2014 (inclusive). The MSF service will be off 
daily between 0800 BST and 1800 BST to allow maintenance to be carried 
out on the masts.


If there is the opportunity to be able to switch the service back on 
earlier than 1800 BST, we will endeavour to do so and minimise the 
outage times. Similarly, if the weather is poor and no work can be 
carried out, the service will be restored as soon as possible.

__


In future, please follow @NPL on Twitter for these announcements.

--
Cheers,
David
Web: http://www.satsignal.eu

___
questions mailing list
questions@lists.ntp.org
http://lists.ntp.org/listinfo/questions

Re: [ntp:questions] Problem facing with Ntp client Configuration

[Danny Mayer]

On 3/25/2014 8:35 AM, Biswajit Panigrahi wrote:
> 
> Hi All,
> When ever I configure ntp client ,then its takes more time even if 7minute to 
> 8 minute difference is there between client and server.
> Please provide me the configuration which will sync within less time.
> Currently ntp.drift file is empty.shall we need to modify the same?
> 
> Current NTP Client configuration is :
> 
> server 10.16.188.254
Add iburst to this line.
Since this is an internal server can you add any more NTP servers? One
is not a good number 3 is good and 4 is better. Never use 2.

> server 127.127.1.0
> fudge 127.127.1.0 stratum 10
> 

Get rid of these last two lines. Unless the ntp client is serving time
elsewhere it's not needed.

> restrict 10.16.188.254 mask 255.255.255.255 nomodify notrap noquery
> restrict 127.0.0.1
> 
> broadcastclient novolley
> broadcastdelay 0
> keys /var/ntp/keys
> 
> logfile /var/log/ntp/ntpd.log
> driftfile /var/log/ntp/ntp.drift
> statsdir /var/log/ntp/
> statistics loopstats peerstats
> filegen loopstats file loopstats type day enable
> filegen peerstats file peerstats type day enable
> 
> 
> 
> 
> Disclaimer:  This message and the information contained herein is proprietary 
> and confidential and subject to the Tech Mahindra policy statement, you may 
> review the policy at http://www.techmahindra.com/Disclaimer.html externally 
> http://tim.techmahindra.com/tim/disclaimer.html internally within 
> TechMahindra.
> 

Not any more. This is a public mailing list and this message is now
available through Google search.

Danny

___
questions mailing list
questions@lists.ntp.org
http://lists.ntp.org/listinfo/questions