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Configuring IPv6 Unicast Routing
Configuring IPv6
To remove all manually configured IPv6 addresses from an interface, use the no ipv6 address interface configuration
command without arguments. To disable IPv6 processing on an interface that has not been explicitly configured with an
IPv6 address, use the no ipv6 enable interface configuration command.
EXAMPLE
This example shows how to enable IPv4 and IPv6 routing on an interface:
Switch(config)# sdm prefer dual-ipv4-and-ipv6 default
Switch(config)# ip routing
Switch(config)# ipv6 unicast-routing
Switch(config)# interface gigabitethernet0/2
Switch(config-if)# no switchport
Switch(config-if)# ip address 192.168.99.1 244.244.244.0
Switch(config-if)# ipv6 address 2001:0DB8:c18:1::/64 eui 64
Switch(config-if)# end
Configuring DHCP for IPv6 Address Assignment
This document describes only the DHCPv6 address assignment. For more information about configuring the DHCPv6
client, server, or relay agent functions, see the “Implementing DHCP for IPv6” chapter in the IPv6 Implementation Guide,
Cisco IOS Release 15.2M&T.
Default DHCPv6 Address Assignment Configuration, page 940
DHCPv6 Address Assignment Configuration Guidelines, page 940
Enabling the DHCPv6 Server Function, page 940
Enabling the DHCPv6 Client Function, page 943
Default DHCPv6 Address Assignment Configuration
By default, no Dynamic Host Configuration Protocol for IPv6 (DHCPv6) features are configured on the switch.
DHCPv6 Address Assignment Configuration Guidelines
When configuring a DHCPv6 address assignment, consider these guidelines:
In the procedures, the specified interface must be one of these Layer 3 interfaces:
— DHCPv6 IPv6 routing must be enabled on a Layer 3 interface.
— SVI: a VLAN interface created by using the interface vlan vlan_id command.
— EtherChannel port channel in Layer 3 mode: a port-channel logical interface created by using the interface
port-channel port-channel-number command.
Before configuring DHCPv6, you must select a Switch Database Management (SDM) template that supports IPv4
and IPv6.
The switch can act as a DHCPv6 client, server, or relay agent. The DHCPv6 client, server, and relay function are
mutually exclusive on an interface.
Enabling the DHCPv6 Server Function
BEFORE YOU BEGIN
See DHCPv6 Address Assignment Configuration Guidelines, page 940.