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Catalyst 3560 Switch Software Configuration Guide
OL-8553-06
Chapter 37 Configuring IPv6 Unicast Routing
Configuring IPv6
Use the no ipv6 nd router-preference interface configuration command to disable an IPv6 DRP.
This example shows how to configure a DRP of high for the router on an interface.
Switch# configure terminal
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# ipv6 nd router-preference high
Switch(config-if)# end
For more information about configuring DRP for IPv6, see the “Implementing IPv6 Addresses and Basic
Connectivity” chapter in the Cisco IOS IPv6 Configuration Library on Cisco.com.
Configuring IPv4 and IPv6 Protocol Stacks
Before configuring IPv6 routing, you must select an SDM template that supports IPv4 and IPv6. If not
already configured, use the sdm prefer dual-ipv4-and-ipv6 {default | routing | vlan} [desktop] global
configuration command to configure a template that supports IPv6. When you select a new template, you
must reload the switch by using the reload privileged EXEC command so that the template takes effect.
Beginning in privileged EXEC mode, follow these steps to configure a Layer 3 interface to support both
IPv4 and IPv6 and to enable IPv6 routing.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
ip routing Enable routing on the switch.
Step 3
ipv6 unicast-routing Enable forwarding of IPv6 data packets on the switch.
Step 4
interface interface-id Enter interface configuration mode, and specify the Layer 3
interface to configure.
Step 5
no switchport Remove the interface from Layer 2 configuration mode (if it is a
physical interface).
Step 6
ip address ip-address mask [secondary] Specify a primary or secondary IPv4 address for the interface.
Step 7
ipv6 address ipv6-prefix/prefix length eui-64
or
ipv6 address ipv6-address link-local
or
ipv6 enable
Specify a global IPv6 address. Specify only the network prefix;
the last 64 bits are automatically computed from the switch
MAC address.
Specify a link-local address on the interface to be used instead
of the automatically configured link-local address when IPv6 is
enabled on the interface.
Automatically configure an IPv6 link-local address on the
interface, and enable the interface for IPv6 processing. The
link-local address can only be used to communicate with nodes
on the same link.
Step 8
end Return to privileged EXEC mode.
Step 9
show interface interface-id
show ip interface interface-id
show ipv6 interface interface-id
Verify your entries.
Step 10
copy running-config startup-config (Optional) Save your entries in the configuration file.