On Thu, Feb 02, 2023 at 01:22:33PM -0500, Vincent Cheng wrote:
> On Fri, Jan 27, 2023 at 05:58:24AM -0800, Vadim Fedorenko via Linuxptp-devel 
> wrote:
> > In case of broken network there is a possibility of having management
> > packets with proper data but absolute absence of sync packets. In such
> > case the selected best master will stuck in HAVE_SYDY state without
> > actually synchronising and will never fail because sync rx timeout timer
> > is armed just after first receive of both SYNC and FOLLOW-UP packets.
> > 
> > The patch arms sync rx timeout timer once sync grant is received.
> 
> I agree the current sync rx timeout timer does not catch the case where
> a SYNC packet is never received.  However the original intent of 
> the syncReceiptTimeout was for 802.1AS-2011.

802.1AS and unicast mode are mutually exclusive, and so I don't see
any harm in re-using the "syncReceiptTimeout" for unicast, but with
slightly different semantics.

Thanks,
Richard


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