Is there any data on packet duplication? said:

NTP you say? How does iburst work during initial sync up?

How does it work, or how should it work? 1/2 :slight_smile:

NTP has been around for a long time. It looks very simple, so anybody thinks
they can toss off an implementation without much thought. It will probably
work, mostly.

The response from an NTP server includes a timestamp that the client put into
the request. The client can use that to reject delayed responses to a
previous request.

When I first started looking for duplicates, I found lots of them. They were
NTP version 1 requests. NTP is up to version 4. Version 1 came out in 1988,
RFC 1059. Since the requests are identical, there is no way for the client to
separate expected responses from delayed responses from a previous request.

Does anybody happen to know what equipment or software or OS/distro is sending
version 1 requests?