In addition to the missing igmp filter code (see lwip multicast thread for sdk 1.2 & 1.3), there is an issue with the ENET_AddMulticastGroup call in the fsl_enet driver for (at least) the K64FRDM package. The current code does not maintain any set up groups. GALR and GAUR needs to be RMW operations.
Jose -
Thanks for raising this issue. I'll forward it onto the team for review.
Jason