Garmin International, Inc. lispers.net Futurewei This document describes limitations of the existing range of dynamic IPv6 multicast addresses specified in RFC3307, Allocation Guidelines for IPv6 Multicast Addresses. It updates RFC3307 by replacing these allocations with a new IANA registry in the IPv6 Multicast Address Space registry group. The document also defines initial contents of the new registry: a reduced allocation for the Multicast Address Dynamic Client Allocation Protocol (MADCAP; RFC2730), a range for SSM, a Private Use range, a range for Experimental Use, and Solicited-Node multicast addresses (which were not previously noted in RFC3307).