[ntp:questions] TimeStamp

Hal Murray hal-usenet at ip-64-139-1-69.sjc.megapath.net
Tue Oct 30 22:51:59 UTC 2007

>I'm very confused on how ntp do the timestamp. I'm running ntpd on
>vxworks. It seems to me that the receive timestamp and the Transmit
>timestamp are using two different clocks, because when I use ethereal/
>wireshark to look up the information of the ntp packet,
>the Recevie Time Stamp is: Jan 1, 1970 00:21:26.0827 UTC
>the Transmit Time Stamp is : Oct 29, 2007 15:20:30.1500 UTC
>However, the actual time period between these two time stamps is only
>a couple second apart. It makes me think that they are using to
>different clock to stamp the packet. Am I Right???

It looks like a bug in the Receive timestamp code.

(That's assuming your clock is within a day or so.)

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