> -----Original Message----- > From: Shawn Bohrer [mailto:[email protected]] > Sent: Tuesday, December 10, 2013 10:48 AM > To: [email protected] > Subject: [Linuxptp-users] using ptp4l on vlan interfaces > > Hello,
Hi :) > > I'm currently a PTPd user but I'm interested in ptp4l especially if I > can take advantage of hardware timestamp support. First step was to > see if I could simply run ptp4l utilizing software timestamps and I > ran into a bit of a snag. We currently run ptpd on a vlan but > attempting to run ptp4l on a vlan interface results in the following: > > # ptp4l -S -i vlan807 -s -l7 -m > interface 'vlan807' does not support requested timestamping mode. > > I took a look at the code and can see this is because vlan interfaces > do not report that they support SOF_TIMESTAMPING_TX_SOFTWARE. > The > underlying device interface eth4 however does claim to support > SOF_TIMESTAMPING_TX_SOFTWARE. > > So I guess I have a couple of questions here regarding ptp4l and > vlans. The first big question is of course is it possible to run > ptp4l on a vlan? Assuming the actual device and driver support > hardware timestamps (or software TX) and provide a PHC is it possible > to access those through a vlan? I am not sure about vlans, but at least for VF drivers, I don't think any currently support PTP.. however I do believe Intel might be able to support hardware timestamps. To support software timestamps I believe the vlan driver would just have to call the correct software timestamp callback, and advertise that it supports the TX_SOFTWARE timestamping in the ethtool call. As for the other.. I think you would only be able to access these if you use direct attach of a virtual function.. Then the virtual function driver could setup its own PHC and timestamping as long as the hardware allowed VFs to enable those features. Regards, Jake > > Thanks, > Shawn > > ------------------------------------------------------------------------------ > Rapidly troubleshoot problems before they affect your business. Most IT > organizations don't have a clear picture of how application performance > affects their revenue. With AppDynamics, you get 100% visibility into > your > Java,.NET, & PHP application. Start your 15-day FREE TRIAL of > AppDynamics Pro! > http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ost > g.clktrk > _______________________________________________ > Linuxptp-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/linuxptp-users ------------------------------------------------------------------------------ Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clktrk _______________________________________________ Linuxptp-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/linuxptp-users
