1064 BigIron RX Series Configuration Guide53-1001986-01Configuring IPv6 on each router interface43• 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 onthe interface, which causes a link-local address to be automatically computed for the interface. Ifpreferred, you can override the automatically configured link-local address with an address that youmanually configure.This section provides the following information:• Configuring a global or site-local address with a manually configured or automaticallycomputed interface ID for an interface.• Automatically or manually configuring a link-local address for an interface.• Configuring IPv6 anycast addressesConfiguring a global or site-local IPv6 addressConfiguring 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 forthat link:• Solicited-node multicast group FF02:0:0:0:0:1:FF00::/104 for each unicast address assignedto the interface.• All-nodes link-local multicast group FF02::1• All-routers link-local multicast group FF02::2The neighbor discovery feature sends messages to these multicast groups. For more information,refer to “Configuring IPv6 neighbor discovery” on page 1076.Configuring a global or site-local IPv6 address with a manually configuredinterface IDTo configure a global or site-local IPv6 address, including a manually configured interface ID, for aninterface, enter commands such as the following.BigIron RX(config)# interface ethernet 3/1BigIron RX(config-if-e100-3/1)# ipv6 address 2001:200:12D:1300:240:D0FF:FE48:4672/64These commands configure the global prefix 2001:200:12d: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 colonsas documented in RFC 2373.You must specify the <prefix-length> parameter as a decimal value. A slash mark (/) must followthe <ipv6-prefix> parameter and precede the <prefix-length> parameter.
