Re: [Linuxptp-users] 802.1AS management

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

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