gary.limanap...@elisys.co.uk wrote: > On Feb 15, 9:15 am, Uwe Klein <uwe_klein_habertw...@t-online.de> > wrote: > >>gary.limanap...@elisys.co.uk wrote: >> >>>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. >> >>Does the ntp process submit these packets repeatedly or >>are you seeing some (uncalled for) "collision/resend" action due to >>issues with the wlan connection? >> >>uwe > > > Would it matter if the packet colided? NTP is using UDP and I can't > see from the packet analyser that it is expects a response back. When > it does work with a known good machine there is no acknowledgement of > the packet being sent. Do you think that there another level of > operation in the network that I am not seeing with the packet analyser?
you usually get retransmission on collision from the hardware ( or the driver ). ( ethernet i am certain about, no firm knowledge about wlan though ) This would be independent of the protocol used. this might help ( look for collision .. RTS/CTS packet ): http://wlan.nat.sdu.dk/802_11standard.htm From my side this is an absolutely blind guess. But it could well be a point to look at before trying to find an app bug that may not be there. uwe _______________________________________________ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions