Brocade Multi-Service IronWare Routing Configuration Guide (Supporting R05.6.00) - Manual (Page 438)

410 Multi-Service IronWare Routing Configuration Guide
53-1003033-02
Configuring IPv6 on each interface
Configuring a link-local IPv6 address
To explicitly enable IPv6 on an interface without configuring a global or unique local unicast
address for the interface, enter commands such as the following.
Brocade(config)# interface ethernet 3/1
Brocade(config-if-e100-3/1)# ipv6 enable
These commands enable IPv6 on Ethernet interface 3/1 and specify that the interface is assigned
an automatically computed link-local address.
Syntax: [no] ipv6 enable
NOTE
When configuring VLANs that share a common tagged interface with a Virtual Ethernet (VE)
interface, it is recommended that you override the automatically computed link-local address with a
manually configured unique address for the interface. If the interface uses the automatically
computed address, which in the case of VE interfaces is derived from a global MAC address, all VE
interfaces will have the same MAC address.
To override a link-local address that is automatically computed for an interface with a manually
configured address, enter commands such as the following.
Brocade(config)# interface ethernet 3/1
Brocade(config-if-e100-3/1)# ipv6 address FE80::240:D0FF:FE48:4672 link-local
These commands explicitly configure the link-local address FE80::240:D0FF:FE48:4672 for
Ethernet interface 3/1.
Syntax: [no] ipv6 address ipv6-address link-local
You must specify the ipv6-address parameter in hexadecimal using 16-bit values between colons
as documented in RFC 2373.
The link-local keyword indicates that the Brocade device interface should use the manually
configured link-local address instead of the automatically computed link-local address.
Configuring IPv6 anycast addresses
In IPv6, an anycast address is an address for a set of interfaces that belong to different nodes.
Sending a packet to an anycast address results in the delivery of the packet to the closest interface
that has an anycast address.
An anycast address looks similar to a unicast address, because it is allocated from the unicast
address space. If you assign an IPv6 unicast address to multiple interfaces, it is an anycast
address. On the device, you configure an interface assigned an anycast address to recognize the
address as an anycast address.
For example, the following commands configure an anycast address on interface 2/1.
Brocade(config)# int e 2/1
Brocade(config-if-e100-2/1)# ipv6 address 2001:db8::6/64 anycast
Syntax: [no] ipv6 address ipv6-prefix|prefix-length [anycast]
IPv6 anycast addresses are described in detail in RFC 1884. See RFC 2461 for a description of how
the IPv6 Neighbor Discovery mechanism handles anycast addresses.