Assuming you are running a recent version of tcpborphserver, the error message is generated at line 2601 or so in tg.c, where the beginning of a packet is compared to the arp header which we can process (arp_const). It maybe be that your network has:
* unusual arp traffic * maybe vlan traffic * or some sort of other corruption. Check with tcpdump on a PC to see if you can spot anything usual, it might not be anything serious but simply something that isn't supported regards marc On Thu, Mar 31, 2016 at 2:23 PM, Amit Bansod <aban...@mpifr-bonn.mpg.de> wrote: > Hi All, > > We are seeing, "arp: unknown or malformed arp packet" messages on ROACH2 > board, quite frequently. > > In our setup, we have ROACH2 board sending data out via a 40G switch. > Sometimes the data is broadcast from ROACH2 boards instead of sending to > a particular ip address. > > The 10GbE core details show ARP table having unknown MAC addresses tied > to unused IP addresses. Is this usual ? We do not have anything else > connected in this closed network. > > We are trying to figure out if the above message is related to this issue. > > How can we debug the root of this message ? > > Thanks, > Amit >
