Cisco Catalyst 2960 Series, Configuration Manual

Page: 272 / 2288

address with an extended unique identifier (EUI) by using the ipv6 address ipv6-prefix/prefix length eui-64
interface configuration command, the address is based on the interface MAC address. See the "Configuring
IPv6 Addressing and Enabling IPv6 Host" section .
If you configure the persistent MAC address feature on the stack and the stack master changes, the stack MAC
address does not change for approximately 4 minutes. For more information, see the "Enabling Persistent
MAC Address" section in "Managing Switch Stacks."
Default IPv6 Configuration
Table 23: Default IPv6 Configuration
Default Setting Feature
Advance desktop. Default is advanced template SDM template
None configured IPv6 addresses
Configuring IPv6 Addressing and Enabling IPv6 Routing
This section describes how to assign IPv6 addresses to individual Layer 3 interfaces and to globally forward
IPv6 traffic on the switch.
Before configuring IPv6 on the switch, consider these guidelines:
• Be sure to select a dual IPv4 and IPv6 SDM template.
• In the ipv6 address interface configuration command, you must enter the ipv6-address and ipv6-prefix
variables with the address specified in hexadecimal using 16-bit values between colons. The prefix-length
variable (preceded by a slash [/]) is a decimal value that shows how many of the high-order contiguous
bits of the address comprise the prefix (the network portion of the address).
To forward IPv6 traffic on an interface, you must configure a global IPv6 address on that interface. Configuring
an IPv6 address on an interface automatically configures a link-local address and activates IPv6 for the
interface. The configured interface automatically joins these required multicast groups for that link:
• solicited-node multicast group FF02:0:0:0:0:1:ff00::/104 for each unicast address assigned to the interface
(this address is used in the neighbor discovery process.)
• all-nodes link-local multicast group FF02::1
• all-routers link-local multicast group FF02::2
For more information about configuring IPv6 routing, see the “ Implementing Addressing and Basic Connectivity
for IPv6
”
chapter in the Cisco IOS IPv6 Configuration Library on Cisco.com.
Beginning in privileged EXEC mode, follow these steps to assign an IPv6 address to a Layer 3 interface and
enable IPv6 forwarding:
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
190
Information About Configuring IPv6 Host Functions