Hi, I am now able to control the packet size from the radio block (by setting spp in the arguments) and from a file source (using the gnuradio vector to stream block). However, it appears that the packet size is limited to 364. If I use a larger packet size for the radio block I get a "timeout on Ch0". If i use a larger packet size on the file source it default back to 364. Is it possible to have a packet size of 512? The reason is that my RFNoC block is expecting data blocks of this length, so compliance with the AXI protocol will be simpler if I can just pass through each packet. Any help would be greatly appreciated, Andy

Max packet size will be limited by your Ethernet MTU. Default MTU is 1500, which corresponds to 1456 bytes plus overhead. 1456/4 = 364. If you want longer packets: # ip link set <interface name> mtu 8000 Nick On Thu, Dec 14, 2017 at 11:18 AM Andrew Thommesen via USRP-users < usrp-users@lists.ettus.com> wrote: > Hi, > > > I am now able to control the packet size from the radio block (by setting > spp in the arguments) and from a file source (using the gnuradio vector to > stream block). However, it appears that the packet size is limited to 364. > If I use a larger packet size for the radio block I get a "timeout on Ch0". > If i use a larger packet size on the file source it default back to 364. > > > Is it possible to have a packet size of 512? The reason is that my RFNoC > block is expecting data blocks of this length, so compliance with the AXI > protocol will be simpler if I can just pass through each packet. > > > Any help would be greatly appreciated, > > > Andy > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >