I encountered one quick question when I reread the spec...the neighbor discovery specification (1970, 2461, and 2461bis) specifies the responding NA to an NS for DAD (identified by the source address being ::) must be sent to all-nodes multicast address:
If the source of the solicitation is the unspecified address, the node MUST set the Solicited flag to zero and multicast the advertisement to the all-nodes address. (section 7.2.4 of 2461bis-05) Does anyone know why this must be sent to the all-nodes address? I mean, why can't this be a solicited-node multicast address for the target address? Since the sender of the NS joins both the group addresses according to the DAD specification, it seems to me that either one should work fine. Is there any special reason for the address selection, or is this just an arbitrary choice? JINMEI, Tatuya Communication Platform Lab. Corporate R&D Center, Toshiba Corp. [EMAIL PROTECTED] -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------