Re: [Linuxptp-users] PTP4L syncing on (gPTP aware) switch A, but not B

[Richard C. <ric...@gm...>]

On Thu, Feb 19, 2015 at 08:03:51PM +0100, Axel Holzinger wrote:
> 
> Well, it was a combination of all three tips. Finally I found out that
> gPTP.cfg sets path_trace_enabled to 1 while switch B doesn't send a path
> trace TLV. That was the reason for ptp4l to drop the announce message.

Switch B is non-compliant with 802.1-AS-2011.  The path trace TLV is
required by clause 10.5.3.2.8 on page 91 and by F.3 g) on page 272.

Thanks,
Richard