Ipv6 address types – Brocade FastIron Ethernet Switch Layer 3 Routing Configuration Guide User Manual
Page 166
FIGURE 17 IPv6 address format
As shown in the above figure, HHHH is a 16-bit hexadecimal value, while H is a 4-bit hexadecimal
value. The following is an example of an IPv6 address.
2001:0000:0000:0200:002D:D0FF:FE48:4672
Note that this IPv6 address includes hexadecimal fields of zeros. To make the address less
cumbersome, you can do the following:
• Omit the leading zeros; for example, 2001:0:0:200:2D:D0FF:FE48:4672.
• Compress the successive groups of zeros at the beginning, middle, or end of an IPv6 address to
two colons (::) once per address; for example, 2001::200:2D:D0FF:FE48:4672.
When specifying an IPv6 address in a command syntax, keep the following in mind:
• You can use the two colons (::) only once in the address to represent the longest successive
hexadecimal fields of zeros
• The hexadecimal letters in IPv6 addresses are not case-sensitive
, the IPv6 network prefix is composed of the left-most bits of the address. As
with an IPv4 address, you can specify the IPv6 prefix using the prefix / prefix-length format, where the
following applies.
The prefix parameter is specified as 16-bit hexadecimal values separated by a colon.
The prefix-length parameter is specified as a decimal value that indicates the left-most bits of the IPv6
address.
The following is an example of an IPv6 prefix.
2001:DB8:49EA:D088::/64
IPv6 address types
As with IPv4 addresses, you can assign multiple IPv6 addresses to a switch interface.
presents the three major types of IPv6 addresses that you can assign to a switch interface.
A major difference between IPv4 and IPv6 addresses is that IPv6 addresses support scope , which
describes the topology in which the address may be used as a unique identifier for an interface or set
of interfaces.
Unicast and multicast addresses support scoping as follows:
• Unicast addresses support two types of scope: global scope and local scope. In turn, local scope
supports site-local addresses and link-local addresses.
local, and link-local addresses and the topologies in which they are used.
• Multicast addresses support a scope field, which
IPv6 address types
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FastIron Ethernet Switch Layer 3 Routing Configuration Guide
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