An IPv6 address is identified by the high-order bits of the address. The following categories of IP addresses are supported in IPv6:

Unicast

An identifier for a single interface. A packet sent to a unicast address is delivered to the interface identified by that address. It can be link-local scope or global scope.

Multicast

An identifier for a group of interfaces (typically belonging to different nodes). A packet sent to a multicast address is delivered to all interfaces identified by that address.

Anycast

An identifier for a group of interfaces (typically belonging to different nodes). A packet sent to an anycast address is delivered to the closest member of a group, according to the routing protocols' measure of distance.

Restriction: Although z/OS® Communications Server can send or forward datagrams to an anycast address, z/OS Communications Server does not support functioning as an anycast endpoint.