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39-11
Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-02
Chapter 39 Configuring IPv6 Unicast Routing
Configuring IPv6
Default IPv6 Configuration
Table 39-2 shows the default IPv6 configuration.
Configuring IPv6 Addressing and Enabling IPv6 Routing
This section describes how to assign IPv6 addresses to individual Layer 3 interfaces and enable the
forwarding of IPv6 traffic globally on the switch.
Note In the ipv6 address interface configuration command, you must enter the ipv6-address and ipv6-prefix
variables in the form documented in RFC 2373 where the address is 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).
For an interface to forward IPv6 traffic, you must configure an IPv6 address on the interface.
Configuring a global 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
Note Before configuring IPv6 on the switch, be sure to select a dual IPv4 and IPv6 SDM template.
For more information about configuring IPv6 routing, see the “Implementing Basic Connectivity for
IPv6” chapter in the Cisco IOS IPv6 Configuration Library at this URL:
http://www.cisco.com/en/US/products/sw/iosswrel/ps5187/products_configuration_guide_chapter0918
6a00801d65f5.html
Note Not all features discussed in this chapter are supported by the Catalyst 3750-E or 3560-E switch.
See the “Unsupported IPv6 Unicast Routing Features” section on page 39-6.
Table 39-2 Default IPv6 Configuration
Feature Default Setting
SDM template Default
IPv6 routing Disabled globally and on all interfaces
CEFv6 or dCEFv6 Disabled (IPv4 CEF and dCEF are enabled by default)
Note When IPv6 routing is enabled, CEFv6 and dCEF6 are automatically
enabled.
IPv6 addresses None configured