[Linuxptp-users] Two Delay_req message

[- - <art...@gm...>]

Hi

Please advise how linuxptp works
As I understand it from the documents I found, ptp works in the following
way:
Announce message
Sync message
Follow_up message
Delay_req message
Delay_resp message

I understand that depending on the mod ptp can work without Follow_up.

But sometimes I see the following things in tcpdump:
Announce message
Sync message
Follow_up message
Delay_req message
Delay_resp message
Delay_req message
Delay_resp message
Announce message
Sync message
Follow_up message
Delay_req message
Delay_resp message

or

Sync message
Follow_up message
Delay_req message
Delay_req message
Delay_resp message
Delay_resp message


So it looks like the master sends two Delay_req.
I just need to understand if it's expected ptp work or it's a bug with the
driver

Best regards,
Vyacheslav