HP A5120 EI Series Configuration Manual page 123

 A loopback address is 0:0:0:0:0:0:0:1 (or ::1). It cannot be assigned to any physical interface and
can be used by a node to send an IPv6 packet to itself in the same way as the loopback address in
IPv4.
An unspecified address is 0:0:0:0:0:0:0:0 (or ::). It cannot be assigned to any node. Before

acquiring a valid IPv6 address, a node fills this address in the source address field of IPv6 packets.
The unspecified address cannot be used as a destination IPv6 address.
Multicast addresses
IPv6 multicast addresses listed in
Table 7 Reserved IPv6 multicast addresses
Address
FF01::1
FF02::1
FF01::2
FF02::2
FF05::2
Multicast addresses also include solicited-node addresses. A node uses a solicited-node multicast address
to acquire the link-layer address of a neighboring node on the same link and to detect duplicate
addresses. Each IPv6 unicast or anycast address has a corresponding solicited-node address. The format
of a solicited-node multicast address is FF02:0:0:0:0:1:FFXX:XXXX. FF02:0:0:0:0:1:FF is fixed and
consists of 104 bits, and XX:XXXX is the last 24 bits of an IPv6 unicast address or anycast address.
EUI-64 address-based interface identifiers
An interface identifier is 64 bits and uniquely identifies an interface on a link.
Interfaces generate EUI-64 address-based interface identifiers differently.
On an IEEE 802 interface (such as a VLAN interface)

The interface identifier is derived from the link-layer address (typically a MAC address) of the interface. To
expand the 48-bit MAC address to a 64-bit interface identifier, you must insert the hexadecimal number
FFFE (16 bits of 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10) into the MAC address (behind the 24th high-order bit). To ensure that the
obtained interface identifier is globally unique, you must also set the universal/local (U/L) bit (which is
the seventh high-order bit) to 1. Therefore, an EUI-64 address-based interface identifier is obtained.
Figure 52 shows how an EUI-64 address-based interface identifier is generated from a MAC address.
Table 7 are reserved for special purposes.
Application
Node-local scope all-nodes multicast address
Link-local scope all-nodes multicast address
Node-local scope all-routers multicast address
Link-local scope all-routers multicast address
Site-local scope all-routers multicast address
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