I had an interesting experience with a Cisco router as ntp master 9 using
itself as an NTP source and it's neighboring switch as the only other NTP
source.
The switch had the exact same configuration right back at the router!. So what
happens? Is NTP smart enough to know that this is a bad
Hi,
-Original Message-
From: unruh [mailto:un...@wormhole.physics.ubc.ca]
Sent: Tuesday, June 15, 2010 7:15 PM
To: questions@lists.ntp.org
Subject: Re: [ntp:questions] Reference clock driver for /dev/rtc
On 2010-06-15, Krejci, Pavel
pavel.kre...@siemens-enterprise.com wrote:
Hi,
Jacobs, Kevin J. kjac...@mitre.org wrote in message
news:70189427bd8ce046b781f28d29c21aee0c9bd78...@imcmbx4.mitre.org...
I had an interesting experience with a Cisco router as ntp master 9
using itself as an NTP source and it's neighboring switch as the only
other NTP source.
The switch
2010/6/15 unruh un...@wormhole.physics.ubc.ca
On 2010-06-14, Marcelo Pimenta marcelopiment...@gmail.com wrote:
Hi everybody!!
My question is about Time Accuracy of NTP/SNTP protocol. I want to know
if
is possible to have precision of 1ms(could be 1 ms?) using SNTP in a
network with
Marcelo Pimenta marcelopiment...@gmail.com wrote:
The idea to have this is not overload the network asking time every second
to keep my accurancy in 1ms in 100% of time. And the second reason is about
how many ms your clock will be wrong in 59 sec without a frame to discipline
my clock again?
2010/6/16 Rob nom...@example.com
Marcelo Pimenta marcelopiment...@gmail.com wrote:
The idea to have this is not overload the network asking time every
second
to keep my accurancy in 1ms in 100% of time. And the second reason is
about
how many ms your clock will be wrong in 59 sec without
Maarten Wiltink wrote:
I don't think it breaks cycles of three or more machines.
However, unless you abuse the local clock, which many packagings of ntpd
do, the stratum mechanism will cut you off.
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questions mailing list
Marcelo Pimenta wrote:
Rob, my understading about the use of SNTP and NTP is: while SNTP provides
time synchronization within *one *network, NTP allows a global time
You are confusing it with timed. SNTP also expects to use global time,
and NTP can be used with an arbitrary timebase,
Marcelo Pimenta marcelopiment...@gmail.com wrote:
In my case, I have* only one* network. My Time Server is not a machine, is a
meinberg GPS. In my point of view, if my source time were machines, maybe
NTP could be better to find a middle line between all these machines used as
time servers.
Marcelo Pimenta marcelopiment...@gmail.com wrote in message
news:aanlktilq6m8apeoasibr-o8mhwifqkfv9xyf6mudr...@mail.gmail.com...
[...]
The NTP algorithm is much more complicated than the SNTP algorithm.
The short, short version: there is no SNTP algorithm. SNTP is NTP
_without_ the algorithms.
Marcelo Pimenta marcelopiment...@gmail.com wrote in message
news:aanlktilaoduniqjgpigohpzvjcv_zmsw_tr7naj6b...@mail.gmail.com...
[...] accuracy of 1ms. On a local network 100usec?? Even if we use
only switches(no routers), how is that possible if I have 4 types of
Latency increasing about
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