Brocade BigIron RX Series Configuration Guide - Manual (Page 1250)

1172 BigIron RX Series Configuration Guide
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Configuring IPv6 on each router interface
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Configuring a link-local IPv6 address
To explicitly enable IPv6 on a router interface without configuring a global or site-local address for
the interface, enter commands such as the following.
BigIron RX(config)# interface ethernet 3/1
BigIron RX(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, Brocade recommends 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.
BigIron RX(config)# interface ethernet 3/1
BigIron RX(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: 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 router 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 belonging to different nodes.
Sending a packet to an anycast address results in the delivery of the packet to the closest interface
configured with the 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 Brocade 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.
BigIron RX(config)# interface ethernet 2/1
BigIron RX(config-if-e100-2/1)# ipv6 address 20:02::6:0/64 anycast
Syntax: ipv6 address <ipv6-prefix>/<prefix-length> [anycast]
IPv6 anycast addresses are described in detail in RFC 1884. Refer to RFC 2461 for a description of
how the IPv6 Neighbor Discovery mechanism handles anycast addresses.