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David Stevens authored
RFC2710 says: 1) MLD messages are never sent for multicast addresses whose scope is 0 (reserved) or 1 (node-local). 2) MLD messages ARE sent for multicast addresses whose scope is 2 (link-local), including Solicited-Node multicast addersses [ADDR-ARCH], except for the link-scope, all-nodes address (FF02::1). The current MLDv1 code does not send reports for link-scope addresses and doesn't restrict scope 0. This may break switches that snoop reports for determining which ports should receive particular addresses. Patch below.
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