Hi Jean-Michel, As you hinted, it might be best to re-post this to the White Rabbit list: https://lists.ohwr.org/sympa/info/white-rabbit-dev
>From my limited experience with White Rabbit and the N310 product, I don't see any obvious issues, other than possibly within the switch. -Daniel On Wed, Oct 17, 2018 at 1:17 PM jean-michel friedt via USRP-users < usrp-users@lists.ettus.com> wrote: > [copy to the White Rabbit Developers mailing list] > > I am considering distributed radiofrequency signal acquisition and > generation using > two Ettus Research X310 SDR platforms, fed with the 1 PPS and 10 MHz > outputs from our > White Rabbit (WR) network. In addition to these signals, the control > software (libuhd) running > on the computer collecting data from all SDR platforms needs to timestamp > packets in order > to synchronize acquisitions. If I run a 1GbE network through a switch, all > works fine, I can > collect synchronous data from the local and remote site. In real life I'd > like to use the > WR network to transfer the data: I know my network configuration is good > since I can ping > the USRPs. I have increased MTUs on the host Ethernet interfaces and the > WRS (running > firmware 5.0.1) to 9000 as advised by libuhd. > In all cases the synchronization of the USRPs fail with error messages > UHD Error: > x300 fw communication failure #1 > EnvironmentError: IOError: x300 fw poke32 - reply timed out > while the same configuration works when replacing the WR network with a > 1GbE switch. Is there > some sort of excess latency introduced by the networking layer of WR that > might be the cause > of the timeout ? Is there any configuration I can tune to try to solve the > issue ? Or lower some > of the timeout limit on libuhd ? > > Thanks, Jean-Michel > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > -- Daniel Jepson Digital Hardware Engineer National Instruments O: +1.512.683.6163 daniel.jep...@ni.com
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