Brocade Communications Systems 6650 manual Configuring IPv4 and IPv6 protocol stacks

Configuring basic IPv6 connectivity on a Layer 3 switch 5

You must specify the <ipv6-address>parameter in hexadecimal using 16-bit values between colons as documented in RFC 2373.

The link-localkeyword indicates that the router interface should use the manually configured link-local address instead of the automatically computed link-local address.

Configuring an IPv6 anycast address on an interface

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 1/1/1.

Brocade(config)#interface ethernet 1/1/1 Brocade(config-if-e10000-1/1/1)#ipv6 address 2001:DB8::/64 anycast

Syntax: 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.

Configuring IPv4 and IPv6 protocol stacks

One situation in which you must configure a router to run both IPv4 and IPv6 protocol stacks is if it is deployed as an endpoint for an IPv6 over IPv4 tunnel.

Each router interface that will send and receive both IPv4 and IPv6 traffic must be configured with an IPv4 address and an IPv6 address. (An alternative to configuring a router interface with an IPv6 address is to explicitly enable IPv6 using the ipv6 enable command. For more information about using this command, refer to “Configuring a link-local IPv6 address on an interface” on page 110.)

To configure a router interface to support both the IPv4 and IPv6 protocol stacks, use commands such as the following.

Brocade(config)#ipv6 unicast-routing Brocade(config)#interface ethernet 1/1/1 Brocade(config-if-e10000-1/1/1)#ip address 192.168.1.1 255.255.255.0 Brocade(config-if-e10000-1/1/1)#ipv6 address 2001:DB8:12d:1300::/64 eui-64

These commands globally enable IPv6 routing and configure an IPv4 address and an IPv6 address for Ethernet interface 1/1/1.

Syntax: [no] ipv6 unicast-routing

To 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 decimal value preceded by a slash mark (/).

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