Ipv6 address types – Brocade Multi-Service IronWare Routing Configuration Guide (Supporting R05.6.00) User Manual
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Multi-Service IronWare Routing Configuration Guide
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IPv6 addressing overview
FIGURE 34
IPv6 address format
, 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:DB8:0000:0000:002D:D0FF:FE48:4672
Note that the sample 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:DB8:0:0:2D: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:DB8::2D:D0FF:FE48:4672.
When specifying an IPv6 address in a command syntax, keep the following in mind:
•
You can use the two colons (::) once in the address to represent the longest successive
hexadecimal fields of zeros.
•
The hexadecimal letters in the IPv6 addresses are not case-sensitive.
As shown in
, 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 or 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 Brocade device interface.
presents the three major types of IPv6 addresses that you can assign to a Brocade device
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 link-local addresses.
describes global and link-local addresses and
the topologies in which they are used.
•
Multicast addresses support a scope field, which