Chapter 42 Ipv6 Addressing; Ipv6 Addressing - Dell PowerConnect B-RX Configuration Manual

IPv6 Addressing

This chapter includes overview information about the following topics:
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IPv6 addressing
A limitation of IPv4 is its 32-bit addressing format, which is unable to satisfy potential increases in
the number of users, geographical needs, and emerging applications. To address this limitation,
IPv6 introduces a new 128-bit addressing format.
An IPv6 address is composed of 8 fields of 16-bit hexadecimal values separated by colons (:).
Figure 143
FIGURE 143
As shown in
The following is an example of an IPv6 address.
2001:0000:0000:0200:002D: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:
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When specifying an IPv6 address in a command syntax, keep the following in mind:
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As shown in
As with an IPv4 address, you can specify the IPv6 prefix using the <prefix>/<prefix-length> format,
where the following applies.
BigIron RX Series Configuration Guide
53-1002253-01
IPv6 addressing.
The IPv6 stateless autoconfiguration feature, which enables a host on a local link to
automatically configure its interfaces with new and globally unique IPv6 addresses associated
with its location.
shows the IPv6 address format.
IPv6 address format
Network Prefix
HHHH HHHH HHHH
Figure 143, HHHH is a 16-bit hexadecimal value, while H is a 4-bit hexadecimal value.
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.
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.
Figure 143, the IPv6 network prefix is composed of the left-most bits of the address.
Interface ID
HHHH HHHH HHHH HHHH
128 Bits
HHHH = Hex Value 0000 – FFFF
HHHH
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