Global Address; Loopback Address; Multicast Address - ZyXEL Communications FMG3024-D10A Series User Manual

Appendix E IPv6

Global Address

A global address uniquely identifies a device on the Internet. It is similar to a "public IP address" in
IPv4. A global unicast address starts with a 2 or 3.
Unspecified Address
An unspecified address (0:0:0:0:0:0:0:0 or ::) is used as the source address when a device does
not have its own address. It is similar to "0.0.0.0" in IPv4.

Loopback Address

A loopback address (0:0:0:0:0:0:0:1 or ::1) allows a host to send packets to itself. It is similar to
"127.0.0.1" in IPv4.

Multicast Address

In IPv6, multicast addresses provide the same functionality as IPv4 broadcast addresses.
Broadcasting is not supported in IPv6. A multicast address allows a host to send packets to all hosts
in a multicast group.
Multicast scope allows you to determine the size of the multicast group. A multicast address has a
predefined prefix of ff00::/8. The following table describes some of the predefined multicast
addresses.
Table 98 Predefined Multicast Address
MULTICAST ADDRESS
FF01:0:0:0:0:0:0:1
FF01:0:0:0:0:0:0:2
FF02:0:0:0:0:0:0:1
FF02:0:0:0:0:0:0:2
FF05:0:0:0:0:0:0:2
FF05:0:0:0:0:0:1:3
The following table describes the multicast addresses which are reserved and can not be assigned
to a multicast group.
Table 99 Reserved Multicast Address
MULTICAST ADDRESS
FF00:0:0:0:0:0:0:0
FF01:0:0:0:0:0:0:0
FF02:0:0:0:0:0:0:0
FF03:0:0:0:0:0:0:0
FF04:0:0:0:0:0:0:0
FF05:0:0:0:0:0:0:0
FF06:0:0:0:0:0:0:0
FF07:0:0:0:0:0:0:0
296
DESCRIPTION
All hosts on a local node.
All routers on a local node.
All hosts on a local connected link.
All routers on a local connected link.
All routers on a local site.
All DHCP severs on a local site.
FMG3024-D10A / FMG3025-D10A Series User's Guide