specification is designed for devices that use an e xtended 8-by te MAC
address. For devices that still use a 6-byte MAC a ddress (als o known as
EUI-48 format), it must be converted into EUI-64 format by invert ing the
universal/local bit in the address and inserting the hexade cimal number
FFFE between the upper and lower three bytes of the MAC address.
For example, if a device had an EUI-48 address of 28-9F-18-1C-82-35, the
global/local bit must first be inverted to meet EUI-64 requirements (i.e., 1 for
globally defined addresses and 0 for locally defined addresses), changing
28 to 2A. Then the two bytes FFFE are inse rted bet ween the O UI (i.e. ,
organizationally unique identifier, or company identifier) and the rest of the
address, resulting in a modified EUI-64 interface identifier of
2A-9F-18-FF-FE-1C-82-35.
- This host addressing method allows the same interface identifier to be used
on multiple IP interfaces of a single device, as long as those interfaces are
attached to different subnets.
• Others – System will automatically detect the address typ e according to the
address/prefix entered in the IPv6 Address field.
Current Address Table
• IPv6 Address – IPv6 address assig ned to this interf ace.
In addition to the unicast addresses assigned to an interface, a n ode is r equ ir ed to
join the all-nodes multicast addresses FF01::1 and FF02::1 for all IPv6 nodes
within scope 1 (interface-local) and scope 2 (link-local), respectively.
FF01::1/16 is the transient node-local multicast address for all attached IPv6
nodes, and FF02::1/16 is the link-local multicast address for all attach ed IPv6
nodes. The node-local multicast address is only used for loopback transmissio n of
multicast traffic. Link-local multicast addresse s cover th e same types as us ed by
link-local unicast addresses, including all nodes (FF02::1), all routers (F F02::2),
and solicited nodes (FF02::1:FFXX:XXXX) as described below.
A node is also required to compute and join the associated solicited-node multicast
addresses for every unicast and anycast address it is assi gned. IPv6 ad dresses
that differ only in the high-order bits, e.g. due to multiple high-order prefixes
associated with different aggregations, will map to the same solicited-node
address, thereby reducing the number of multicast addresses a node m ust joi n. In
this example, FF02::1:FF90:0/104 is the solicited-node multicast address which i s
formed by taking the low-order 24 bits of the address and a ppend ing thos e bits to
the prefix.
Note that the solicited-node multicast address (link-local scope FF02) is used to
resolve the MAC addresses for neighbor nodes since IPv6 does n ot support the
broadcast method used by the Address Resolution Protocol in IPv4.
• Address Type – Global, Link-local or Multicast.
• Configuration Mode – Shows if address is set manually or a uto config ured.
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Setting the Switch’s IP Address (IP Version 6)
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