I'm not really sure where to address this question. I am debugging some DHCPv6 code, and I asked my system for multicast membership, and "netstat -g" told me that I was a member of all-systems.mcast.net. Adding -n told me the IPv4 values, but I then noticed that the V6 addresses did not have a reverse. icann.org seems to maintain the reverse for 224.in-addr.arpa, so naturally 224.0.0.1 gets mapped that way. Doing a dig on reverse for ff02::1 gets me: ip6.arpa. 3587 IN SOA b.ip6-servers.arpa. hostmaster.icann.org. 2014061793 1800 900 604800 3600 and asking about ip6-servers.arpa tells me that iab@xxxxxxx is the admin contact, and iana@xxxxxxxx is the technical contact. I guess it's IANA's job to populate the reverse for ff::/8 with something? I'm wondering when this might occur... what will it point to? mcast.net is a Verisign property. The contact address is very generic, so I am skeptical that an email to that address will return something useful, but I've tried anyway. -- Michael Richardson <mcr+IETF@xxxxxxxxxxxx>, Sandelman Software Works -= IPv6 IoT consulting =-
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