Hi Ioana, I'm attaching a model and python script that Guy Kenfack and I knocked together worked on at the Green Bank workshop. We sent a counter and saw the data at the right IP/port in wireshark.
A question to anyone in the know: is there a runtime way to configure the source IP/mac settings on roach 2 -- i.e. is tap_start implemented for the 1GbE core? Cheers, Jack On 21 January 2013 08:07, Marc Welz <[email protected]> wrote: > Hello > > > However, we are stuck in debugging the system: we think we are sending > stuff > > properly, but we can not read anything from the python socket, coming > from > > our roach 2 fpga. > > Try running tcpdump on the receiving PC. If you are using tgtap logic, > you should see occasional arp traffic from the roach to work out where > to send its > data. > > Some switches have UDP flood protection - if they see lots of UDP traffic, > especially broadcast UDP, they throttle it down. If tgtap is running and I > remember things correctly, data destined for machines which do not respond > to arp traffic will be broadcast. Alternatively if the destination MAC > is all zeros, > switches typically discard traffic instead of sending it on. > > I believe you are one of the first people to use the GbE port, so please > let us know of your progress. > > regards > > marc > >
