On Thu, Dec 15, 2016 at 06:18:33PM +0000, Taber, Alan wrote:
> I have a SecureSync 9400 GrandMaster clock that is appropriately putting out 
> PTPv2 Sync and Announce packets (verified by Wireshark listening on a 
> different network node). I have run tcpdump -i enp9s0 -v to check to see that 
> the packets are getting through to my RHEL 7 server, and they are showing up.
> 
> Yet, when I run ptp4l -i enp9s0 -m, I get the following:

Here ptp4l uses the default UDP/IPv4 transport.

> What indicators should I be looking at to see why the local ptp daemon isn't 
> listening to the packets the server is receiving?

Possibly the server is configured for Layer2 or IPv6?

HTH,
Richard


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