Re: [Linuxptp-users] IEEE802.1AS gPTP Boundary Clock
Hi Miroslav, Thanks! In my understanding of "Time Aware Bridge", it doesn't correct/adjust/tune the PHC. Is that not correct? Nemo On Monday, 6 February, 2023 at 11:01:51 am GMT-5, Miroslav Lichvar wrote: On Mon, Feb 06, 2023 at 03:21:25PM +, Nemo Crypto wrote: > Hi Linuxptp-users, > I am using gPTP 802.1AS profile for my network. My simplified network > topology looks like this, > TimeLeader --> Eth Switch (802.1as Time Aware Bridge)-->Processor > (BC?)--->TimeFollower > In the above topology, The processor runs linuxptp (ptp4l & phc2sys) has 2 > interfaces. One interface should act as 802.1AS TimeFollower and other should > act as 802.1AS TimeLeader. I know that IEEE1588 BoundaryClock has this > feature. But I am not sure if 802.1AS (gPTP) has similar feature. > > Can you please share me details? If this is supported by LinuxPTP, can you > please help me how would the configuration file look like? IIRC gPTP has time-aware bridges which are equivalent to PTP boundary clocks. ptp4l as a boundary clock doesn't require any special configuration. For a gPTP example see configs/gPTP.cfg in the linuxptp tarball/repository. If your interfaces don't share a PTP clock, you will need to enable the boundary_clock_jbod option and run phc2sys to keep the two PHCs synchronized. However, that might not meet the gPTP requirements on accuracy. -- Miroslav Lichvar ___ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
Re: [Linuxptp-users] IEEE802.1AS gPTP Boundary Clock
On Mon, Feb 06, 2023 at 03:21:25PM +, Nemo Crypto wrote: > Hi Linuxptp-users, > I am using gPTP 802.1AS profile for my network. My simplified network > topology looks like this, > TimeLeader --> Eth Switch (802.1as Time Aware Bridge)-->Processor > (BC?)--->TimeFollower > In the above topology, The processor runs linuxptp (ptp4l & phc2sys) has 2 > interfaces. One interface should act as 802.1AS TimeFollower and other should > act as 802.1AS TimeLeader. I know that IEEE1588 BoundaryClock has this > feature. But I am not sure if 802.1AS (gPTP) has similar feature. > > Can you please share me details? If this is supported by LinuxPTP, can you > please help me how would the configuration file look like? IIRC gPTP has time-aware bridges which are equivalent to PTP boundary clocks. ptp4l as a boundary clock doesn't require any special configuration. For a gPTP example see configs/gPTP.cfg in the linuxptp tarball/repository. If your interfaces don't share a PTP clock, you will need to enable the boundary_clock_jbod option and run phc2sys to keep the two PHCs synchronized. However, that might not meet the gPTP requirements on accuracy. -- Miroslav Lichvar ___ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
[Linuxptp-users] IEEE802.1AS gPTP Boundary Clock
Hi Linuxptp-users, I am using gPTP 802.1AS profile for my network. My simplified network topology looks like this, TimeLeader --> Eth Switch (802.1as Time Aware Bridge)-->Processor (BC?)--->TimeFollower In the above topology, The processor runs linuxptp (ptp4l & phc2sys) has 2 interfaces. One interface should act as 802.1AS TimeFollower and other should act as 802.1AS TimeLeader. I know that IEEE1588 BoundaryClock has this feature. But I am not sure if 802.1AS (gPTP) has similar feature. Can you please share me details? If this is supported by LinuxPTP, can you please help me how would the configuration file look like? Thanks,Nemo ___ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
