[Linuxptp-users] Support of G.8275.1 / .2 telecom profile

[Christian L. <chr...@ch...>]

Hi Richard



Is there any plan or ongoing activities to support telecom profile according to G.8275.1 / .2?



In particular the red functionalities are missing if I'm not mistaken.


Profile comparison


8275.1

8275.2

Power profile

Transport

L2
- Uses the Ethernet addresses identified in IEEE1588-2008 Annex F
- Support of unicast IP has been proposed but not agreed (yet?)

Unicast IPv4
Not supported by PTP4L

L3E2E: Multicast IPv4 or v6
L2P2P: Multicast L2

Unicast negotiation mechanism

no

Required (as a consequence of unicast addressing)

[cid:image001.jpg@01D3F8D5.C4C78950]

Not supported by PTP4L

no

Master selection


Configuration for master selection

Uses "alternate BMCA": supports multiple active grandmasters for redundancy

Clients must know time servers


Not supported by PTP4L

Same as 8275.1


Default BMCA

Time signal clean up

no

Uses boundary or transparent clocks where necessary to "clean up" time signal as it passes through the network

PTP4L: a BC inherently does some clean-up. Configurable parameters / control algorithms in PTP4L

no






With kind regards



Christian Leeb

Senior Project Manager

ABB Switzerland Ltd

PGGA-P5

Bruggerstrasse 72

5400, Baden, SWITZERLAND

Phone: +41 58 585 19 59

Mobile: +41 79 341 57 57