Thanks, All! John
> Marc is correct. The ARP table is not involved in multicast. The multicast > MAC is just mapped from the multicast IP. > > Wesley New > South African SKA Project > +2721 506 7300 > www.ska.ac.za > > > > On Thu, Nov 5, 2015 at 12:51 PM, Marc Welz <[email protected]> wrote: > >> David MacMhaon wrote: >> >> >> I think multicast transmit is easy (just populate the ARP table >> >> appropriately). I think multicast receive is also supported with >> recent >> >> versions of the 10GbE yellow block. You could probably check the >> >> mlib_devel git commit logs for the yellow block code to find clues. >> >> Not sure if the arp table is involved in this - the destination mac is >> (should be) >> generated algorithmically from the destination multicast IP address, >> though >> the above might be a unusual workaround. >> >> Sending is reasonably straighforward, as there is no control traffic >> involved. >> Reception does require a newer romfs/tcpborphserver where we get the >> kernel >> to issue IGMP requests on the 10Gbe interfaces, so that the traffic >> arrives >> at the particular port. >> >> regards >> >> marc >> >> >
