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Understanding IPv6
Figure 39-1
the IP packet and destination addresses.
Figure 39-1
Use the dual IPv4 and IPv6 switch database management (SDM) template to enable IPv6 routing. For
more information about the dual IPv4 and IPv6 SDM template, see
Templates."
The dual IPv4 and IPv6 templates allow the switch to be used in dual stack environments.
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For more information about IPv4 and IPv6 protocol stacks, see the "Implementing IPv6 Addressing and
Basic Connectivity" chapter of Cisco IOS IPv6 Configuration Library on Cisco.com.
DHCP for IPv6 Address Assignment
DHCPv6 enables DHCP servers to pass configuration parameters, such as IPv6 network addresses, to
IPv6 clients. The address assignment feature manages nonduplicate address assignment in the correct
prefix based on the network where the host is connected. Assigned addresses can be from one or multiple
prefix pools. Additional options, such as default domain and DNS name-server address, can be passed
back to the client. Address pools can be assigned for use on a specific interface, on multiple interfaces,
or the server can automatically find the appropriate pool.
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 Cisco IOS IPv6 Configuration Library on Cisco.com.
Static Routes for IPv6
Static routes are manually configured and define an explicit route between two networking devices.
Static routes are useful for smaller networks with only one path to an outside network or to provide
security for certain types of traffic in a larger network.
Cisco Catalyst Blade Switch 3130 and 3032 for Dell Software Configuration Guide
39-6
shows a router forwarding both IPv4 and IPv6 traffic through the same interface, based on
Dual IPv4 and IPv6 Support on an Interface
IPv4
IPv6
If you try to configure IPv6 without first selecting a dual IPv4 and IPv6 template, a warning message
appears.
In IPv4-only environments, the switch routes IPv4 packets and applies IPv4 QoS and ACLs in
hardware. IPv6 packets are not supported.
In dual IPv4 and IPv6 environments, the switch routes both IPv4 and IPv6 packets and applies IPv4
QoS in hardware.
The switch does not support IPv6 QoS.
If you do not plan to use IPv6, do not use the dual stack template because this template results in
less TCAM capacity for each resource.
10.1.1.1
3ffe:yyyy::1
Chapter 39
Configuring IPv6 Unicast Routing
Chapter 8, "Configuring SDM
OL-12247-04
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