FastIron Configuration Guide
FastIron Configuration Guide
07.4.00a
Part Number: 53-1002494-02
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FWS Series Switch IPv6 management : IPv6 addressing

IPv6 addressing
IPv4 is limited because of the 32-bit addressing format, which cannot 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 33 shows the IPv6 address format.
Figure 33 IPv6 address format
As shown in Figure 33, 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:
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:
As shown in Figure 33, 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
Enabling and disabling IPv6
IPv6 is enabled by default for Brocade devices that support it. If desired, you can disable IPv6 on a global basis on an device by entering the following command at the Global CONFIG level of the CLI.
Brocade(config)#no ipv6 enable
 
Syntax:
To re-enable IPv6 after it has been disabled, enter the ipv6 enable command.

FWS Series Switch IPv6 management : IPv6 addressing