I have not been able to receive IPv4 multicast packets in u-boot on the patches-v2020.04-l4t-r32.4.3 branch of nvidia u-boot on a JetsonTX2 on a custom carrier board. I have verified this by placing print statements in the net_process_received_packet() function in net/net.c to print the contents of the received packets.
The destination MAC address of the multicast packet I want the Jetson to receive is 01:00:5e:00:00:01 and the destination IP is 22.214.171.124. I can receive other Ethernet packets with broadcast MAC FF:FF:FF:FF:FF:FF but not the multicast packets. I have searched on this forum and elsewhere to see if I was missing a u-boot configuration option but I have not had any luck getting this to work yet. I have looked into the elements of the network stack net.c/eth_uclass.c/dwc_eth_eqos.c to see if I could find where MAC and/or IP filtering is taking place but have not closed in on the solution yet.
Does anyone know the steps required to make the Jetson TX2 able to receive IPv4 multicast packets to MAC 01:00:5e:00:00:01 in u-boot or where in the network stack I should be looking to solve this problem? Does the Jetson u-boot network stack filter on IP along with MAC address or just MAC address? I have run some tests to attempt to determine this but I am not 100% sure yet.