Bellcore In some environments the consumption of reassembly contexts and VC space may be too high for all Class D groups to use full VC meshes as described in Internet Draft draft-armitage-ipatm-ipmc-02.txt ('IP Multicast over UNI 3.0 based ATM Networks'). This memo explores possible ways of sharing the load between Multicast Servers and full VC meshes in an RFC 1577/UNI3.0 environment.