Brocade FastIron Ethernet Switch Layer 3 Routing Configuration Guide - Manual (Page 173)

IPv6 configuration on each router interface
To forward IPv6 traffic on a router interface, the interface must have an IPv6 address, or IPv6 must be
explicitly enabled. By default, an IPv6 address is not configured on a router interface.
If you choose to configure a global or site-local IPv6 address for an interface, IPv6 is also enabled on
the interface. Further, when you configure a global or site-local IPv6 address, you must decide on one
of the following in the low-order 64 bits:
• A manually configured interface ID.
• An automatically computed EUI-64 interface ID.
If you prefer to assign a link-local IPv6 address to the interface, you must explicitly enable IPv6 on the
interface, which causes a link-local address to be automatically computed for the interface. If preferred,
you can override the automatically configured link-local address with an address that you manually
configure.
This section provides the following information:
• Configuring a global or site-local address with a manually configured or automatically computed
interface ID for an interface.
• Automatically or manually configuring a link-local address for an interface.
• Configuring IPv6 anycast addresses
Configuring a global or site-local IPv6 address on an interface
Configuring a global or site-local IPv6 address on an interface does the following:
• Automatically configures an interface ID (a link-local address), if specified.
• Enables IPv6 on that interface.
Additionally, the configured interface automatically joins the following required multicast groups for that
link:
• Solicited-node multicast group FF02:0:0:0:0:1:FF00::/104 for each unicast address assigned to the
interface.
• Solicited-node for subnet anycast address for each unicast assigned address
• Solicited-node for anycast address FF02:0:0:0:0:1:FF00::0000
• All-nodes link-local multicast group FF02::1
• All-routers link-local multicast group FF02::2
The neighbor discovery feature sends messages to these multicast groups. For more information, refer
to
IPv6 neighbor discovery configuration on page 183.
Configuring a global or site-local IPv6 address with a manually configured interface ID
To configure a global or site-local IPv6 address, including a manually configured interface ID, for an
interface, enter commands such as the following.
device(config)#interface ethernet 3/1
device(config-if-e1000-3/1)#ipv6 address 2001:DB8:12D:1300:240:D0FF:
FE48:4672:/64
These commands configure the global prefix 2001:DB8:12d:1300::/64 and the interface ID ::
240:D0FF:FE48:4672, and enable IPv6 on Ethernet interface 3/1.
Syntax: ipv6 address ipv6-prefix/prefix-length
You must specify the ipv6-prefix parameter in hexadecimal using 16-bit values between colons as
documented in RFC 2373.
IPv6 configuration on each router interface
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