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According to https://en.wikipedia.org/wiki/IPv6_address#Multicast_addresses, ff05::1:3 is a site local multicast address for All-dhcp-servers. Based on this, when I add the DHCP role to a Windows Server 2012 R2, is it appropriate to assign ff05::1:3 as one of the IPv6 addresses on the network interface?

Ben Gribaudo
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1 Answers1

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IPv4 DHCP is used with broadcast, but IPv6 doesn't have broadcast. Multicast addresses are group addresses to be used as destination addresses for groups to which hosts subscribe. You don't assign multicast addresses to a host interface. Your DHCP server would subscribe to the multicast group, as would all the DHCP servers.

RFC 4291, IP Version 6 Addressing Architecture:

2.7. Multicast Addresses

An IPv6 multicast address is an identifier for a group of interfaces (typically on different nodes). An interface may belong to any number of multicast groups. Multicast addresses have the following format:

|   8    |  4 |  4 |                  112 bits                   |
+------ -+----+----+---------------------------------------------+
|11111111|flgs|scop|                  group ID                   |
+--------+----+----+---------------------------------------------+

binary 11111111 at the start of the address identifies the address as being a multicast address.

Community
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Ron Maupin
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