Brocade Multi-Service IronWare Routing Configuration Guide (Supporting R05.6.00) - Manual (Page 436)

408 Multi-Service IronWare Routing Configuration Guide
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Enabling IPv6 routing
Enabling IPv6 routing
By default, IPv6 routing is enabled. If forwarding of IPv6 traffic globally on the device has been
disabled, you can enable it by entering the following command.
Brocade(config)# ipv6 unicast-routing
Syntax: [no] ipv6 unicast-routing
To disable the forwarding of IPv6 traffic globally on the device, enter the no form of this command.
NOTE
Downgrading from release 04.1.00 to an earlier release of the software can impact IPv6 routing. In
earlier versions of the Multi-Service IronWare software, IPv6 routing was disabled by default. As of
release 04.1.00, IPv6 routing is enabled by default and therefore does not appear in the
configuration. If you are downgrading from 04.1.00 to an earlier version of the software and want
IPv6 routing to be enabled, you must add the line “ipv6 unicast-routing” to the configuration.
Configuring IPv6 on each interface
To forward IPv6 traffic on an interface, the interface must have an IPv6 address, or IPv6 must be
explicitly enabled. By default, an IPv6 address is not configured on an interface.
If you choose to configure a global or unique local IPv6 unicast address (ULA) for an interface, IPv6
is also enabled on the interface. Further, when you configure a global or unique local IPv6 unicast
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,
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 unique local IPv6 unicast 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 unique local IPv6 unicast address
Configuring a global or unique local IPv6 unicast 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: