Configuration Guide User guide

1166 BigIron RX Series Configuration Guide
53-1002484-04
IPv6 addressing
43
• 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 (::) 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 Figure 153, 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:FF08:49EA:D088::/64
IPv6 address types
As with IPv4 addresses, you can assign multiple IPv6 addresses to a switch interface. Table 187
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. Table 187 describes global,
site-local, and link-local addresses and the topologies in which they are used.
• Multicast addresses support a scope field, which Table 187 describes.