Appendix E IPv6
VMG1312-B Series User’s Guide
352
Global Address
A global address uniquely ident ifies a device on the I nternet . I t is sim ilar t o a “ public I P address” in
I Pv4. A global unicast address start s wit h a 2 or 3.
Unspecified Address
An unspecified address ( 0: 0: 0: 0: 0: 0: 0: 0 or : : ) is used as t he source address when a device does
not have its own address. I t is sim ilar to “ 0.0.0.0” in I Pv4.
Loopback Address
A loopback address (0: 0: 0: 0: 0: 0: 0: 1 or : : 1) allows a host to send packets t o itself. I t is sim ilar t o
“ 127.0.0.1” in I Pv4.
Multicast Address
I n I Pv6, m ult icast addresses provide t he sam e funct ionality as I Pv4 br oadcast addresses.
Broadcasting is not support ed in I Pv6. A m ulticast address allows a host to send packets t o all host s
in a m ulticast group.
Multicast scope allows you to det erm ine t he size of t he m ult icast group. A m ult icast address has a
predefined prefix of ff00: : / 8. The following table describes som e of the predefined m ulticast
addresses.
The following t able describes t he m ult icast addresses which are reserved and can not be assigned
to a m ulticast group.
Table 127 Predefined Multicast Address
MULTICAST ADDRESS DESCRIPTION
FF01:0:0:0:0:0:0:1 All hosts on a local node.
FF01:0:0:0:0:0:0:2 All routers on a local node.
FF02:0:0:0:0:0:0:1 All hosts on a local connected link.
FF02:0:0:0:0:0:0:2 All routers on a local connected link.
FF05:0:0:0:0:0:0:2 All routers on a local site.
FF05:0:0:0:0:0:1:3 All DHCP severs on a local site.
Table 128 Reserved Mult icast 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
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