Am 2018-09-05 13:27, schrieb Richard Cochran:
On Wed, Sep 05, 2018 at 08:44:18AM +0000, Y.b. Lu wrote:
Currently linuxptp supports 802.1AS end-station, but not supports
time-aware bridge.
We will have switch devices supporting PHC APIs and SO_TIMESTAMPING.
Could I just run P2P TC config linuxptp on switch, and run gPTP config
linuxptp on other devices for synchronization?
This seemed not proper, but I'm curious about whether it work from
protocol level.
I don't think it would work, even on the protocol level. For one
thing, you need to enable the follow-up info TLV. After that, you
need to accumulate the port delays and the frequency offsets. But I
would need to review the TAB to be sure.
FYI, I'm working on that and identified the following missing pieces:
(1) cumulativeRateRatio
(2) management access
(3) path trace TLV
(4) announce messages
(5) switch to gm mode
I have a patches in prepation for (1), (2). I'm still working on (3) and
(4) and I will be ignoring (5) for now. I guess as a first step, being a
non-gm capable bridge is fine.
-michael
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