> -----Original Message-----
> From: Jord Pool [mailto:jord.p...@gmail.com]
> Sent: Friday, April 20, 2018 6:25 AM
> To: Miroslav Lichvar <mlich...@redhat.com>
> Cc: Yan Yankovskyi via Linuxptp-users <linuxptp-users@lists.sourceforge.net>
> Subject: Re: [Linuxptp-users] Timemaster
> 
> Thank you for you answer!
> 
> When I run $ sudo tcpdump | grep ‘ptp’ it does return a lot of the following 
> two
> messages (repeatedly):
> 
> 15:17:55.746473 IP 10.0.0.218.ptp-event > ptp-primary.mcast.net
> <http://primary.mcast.net> .ptp-event: UDP, length 44
> 15:17:55.746504 IP 10.0.0.218.ptp-general > ptp-primary.mcast.net
> <http://primary.mcast.net> .ptp-general: UDP, length 44
> 15:17:55.784460 IP 10.100.0.1.ptp-event > ptp-primary.mcast.net
> <http://primary.mcast.net> .ptp-event: UDP, length 44
> 

Careful. Tcpdump requests to put the device in promiscuous mode, which would 
usually bypass the local firewall or other interference. What happens if you 
pass the flag to disable this? i.e. "-p" or "--no-promiscuous-mode"?

Thanks,
Jake 
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