Thank you, Richard!

Eric Decker

-----Original Message-----
From: Richard Cochran <richardcoch...@gmail.com>
Sent: Thursday, April 13, 2023 6:17 PM
To: Eric Decker <eric.dec...@torc.ai>
Cc: linuxptp-users@lists.sourceforge.net
Subject: Re: [Linuxptp-users] 802.1AS management

On Thu, Apr 13, 2023 at 05:03:50PM +0000, Eric Decker wrote:
> I am working on monitoring gPTP health for automotive products using 802.1AS.
> According to 802.1AS-2020:
>
>   1.  Section 10.6.1 "PTP Management Messages are not used in this standard. 
> They are specified in IEEE Std 1588-2019."
>      *   Does this means gPTP does not support PTP management messages?

Seems like it.

>      *   If ptp4l is configured to use 802.1AS will it support management 
> messages?

Yes.

>   2.  Section 15.1 "Managed objects are accessed via a virtual information 
> store, termed the Management Information Base (MIB). MIB objects are 
> generally accessed through the Simple Network Management Protocol (SNMP)."
>      *   My understanding is that PTP management messages at not supported 
> and MIBs and SNMP should be used instead.
>      *   Does Linux PTP support MIBs and SNMP?  From what I can tell from the 
> code it does not.   I looked at the mailing list and it appears SNMP support 
> was removed around March 2020 because it was not complete.  It does not 
> appear it has been added back to the code base, at least not on the Git 
> master branch.  Are there plans to support MIBs and SNMP in the future?

SNMP is not supported, and there are no plans to add that.

>   3.  Does Linux PTP support "reverse sync" for monitoring, or will it 
> support it in the future?

Yes, it supports the NetSync Monitor (NSM) protocol.  See the 'nsm'
program and its man page.

Thanks,
Richard
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