Re: [Linuxptp-devel] [PATCH 1/4] Schedule announce TX timeout also when in slave-only mode

[Delio B. <dbr...@au...>]

On Dec 1, 2013, at 7:52 AM, Richard Cochran <ric...@gm...> wrote:

> On Sat, Nov 30, 2013 at 09:46:46PM +0100, Delio Brignoli wrote:
> 
>> ... the portRole should be set to MasterPort which makes the
>> txAnnounce method reachable.
> 
> So, once the port's role becomes "master", doesn't it also transmit
> sync messages?

I do not think so because the second paragraph of section 10.2.1 says the SiteSyncSync state machine ignores sync information sent to them by the ClockMasterSyncSend state machine if the time-aware system is not grandmaster-capable. This is also re-iterated in the second paragraph of section 10.2.8.3. This seems to imply, albeit not in a very obvious way, that PortSyncSyncSend and MDSyncSend never operate in a time-aware system that is not grandmaster capable, hence no sync TX.

Thanks
--
Delio