1078 BigIron RX Series Configuration Guide53-1001810-01Configuring IPv4 and IPv6 protocol stacks43This command explicitly configures the link-local address FE80::240:D0FF:FE48:4672 for theglobal interface.Syntax: ipv6 address <ipv6-address> link-localYou must specify the <ipv6-address> parameter in hexadecimal using 16-bit values betweencolons as documented in RFC 2373.The link-local keyword indicates that the router interface should use the manually configuredlink-local address instead of the automatically computed link-local address.Configuring IPv4 and IPv6 protocol stacksOne situation in which you must configure a router to run both IPv4 and IPv6 protocol stacks is if itis deployed as an endpoint for an IPv6 over IPv4 tunnel.Each router interface that you want to send and receive both IPv4 and IPv6 traffic must beconfigured with an IPv4 address and an IPv6 address. (An alternative to configuring a routerinterface with an IPv6 address is to explicitly enable IPv6 using the ipv6 enable command. Formore information about using this command, refer to “Configuring a link-local IPv6 address” onpage 1069.)To configure a router interface to support both the IPv4 and IPv6 protocol stacks, use commandssuch as the following.BigIron RX(config)# ipv6 unicast-routingBigIron RX(config)# interface ethernet 3/1BigIron RX(config-if-e100-3/1)# ip address 192.168.1.1 255.255.255.0BigIron RX(config-if-e100-3/1)# ipv6 address 2001:200:12d:1300::/64 eui-64These commands globally enable IPv6 routing on the router and configure an IPv4 address and anIPv6 address for Ethernet interface 3/1.Syntax: [no] ipv6 unicast-routingTo disable IPv6 traffic globally on the router, enter the no form of this command.Syntax: ip address <ip-address> <sub-net-mask> [secondary]You must specify the <ip-address> parameter using 8-bit values in dotted decimal notation.You can specify the <sub-net-mask> parameter in either dotted decimal notation or as a decimalvalue preceded by a slash mark (/).The secondary keyword specifies that the configured address is a secondary IPv4 address.To remove the IPv4 address from the interface, enter the no form of this command.Syntax: ipv6 address /<prefix-length> [eui-64]This syntax specifies a global or site-local IPv6 address. For information about configuring alink-local IPv6 address, refer to “Configuring a link-local IPv6 address” on page 1069.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.
