[ntp:questions] Very rapid polling

Unruh unruh-spam at physics.ubc.ca
Sat Feb 14 21:43:20 UTC 2009

gary.limanapier at elisys.co.uk writes:

>Just joining this discussion as we have noticed NTP request from our
>Authorised Server every 300ms on our LAN. They occur only between the
>Time Server and the WiFi Tablet during a socket connection while there
>is a low signal strength. The Tablet sends its own NTP request with a
>Poll Interval of 4 (16 seconds). The server returns its response
>increasing the Poll Interval to 10 (1024 secs). The server then keeps
>sending this same packet every 300-500ms. This chokes our network and
>causes other machines to timeout and disconnect their sockets, even
>though these other machines are using copper connections. All machines
>are WIndows XP SP3, except the Tablets which are XP Table Edition. The
>only way we can stop it is to disable W32Time process on the Tablets,
>but this then leaves them unsynchronised. Still searching for a

So this definitely sounds like a bug of some kind in the Windows server's
ntp code. Are they running the ntpd reference implimentation or what ntp
software are they running?

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