hello NTP enthusiasts,
this is a forwarded email of a response from a mayor home router
manufacturer in Germany that makes the popular
Fritzbox routers, somehow the device is able to detect latencies on the
first hop in both send and receive directions,
however it is not able to compensate for them (which would in my opinion
be possible by delaying the send time by
the difference in the send / receive latencies). Considering the
statistics of my NTP server here
http://www.pool.ntp.org/scores/2001:980:59fb:1:250:c2ff:fed3:fd36 it
seems that indeed
the asymmetric latency caused by my line causes the average offset of
about 11 ms . Anyway the manufacturer has
promised to look into it and hopefully will allow for a configuration
option to correct for the differences in a future
firmware update.
reference https://twitter.com/hnapel/status/724022365441646592
greetings,
Harm ten Napel
-------- Doorgestuurd bericht --------
Onderwerp: Your support enquiry for FRITZ!Box 7360 int. with Ticket-ID
394208
Datum: Tue, 26 Apr 2016 13:46:56 +0000
Van: AVM Support <[email protected]>
Antwoord-naar: AVM Support <[email protected]>
Aan: Harm ten Napel <[email protected]>
##- Please type your reply above this line -##
AVM Support
Your support enquiry for FRITZ!Box 7360 int. with *Ticket-ID 394208*
*Michael Ellguth* (AVM Support)
26 Apr, 15:46
Dear Mr. ten Napel,
Thank you very much for your enquiry and for contacting the AVM Support.
The values described by you cannot be configured or edited by the user
manually. They are negotiated or simply detected by the FRITZ!Box.
However, I have forwarded your enquiry as an enhancement request to our
product manager.
We always focus on our customers' wishes and needs when further
developing our products. In the past we were able to implement numerous
suggestions from our customers, often even in the following update.
In the future you can also use our feedback form
<https://en.avm.de/contact/suggestions-for-fritz-products> to send us
constructive ideas and suggestions for enhancing FRITZ! products.
Best regards from Berlin
Michael Ellguth (AVM Support)
*Harm ten Napel*
25 Apr, 20:26
On the DSL information page there is a different latency reported for
the send (3 ms) and receive (14 ms) directions, this is bad for NTP
(either running na time server or receiving time updates from the
internet), since the Fritzbox is capable of detecting these latencies
(how?) is it possible to compensate for it? That would be a nice feature.
© AVM GmbH, Alt-Moabit 95, 10559 Berlin
HRB 57000 AG Charlottenburg
Geschäftsführer: Johannes Nill, Peter Faxel, Ulrich Müller-Albring
[JM9Z02-9XE1]
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