Cisco IE-4000 Software Configuration Manual page 664

Configuring IPv6 Host Functions
Information About Configuring IPv6 Host Functions
For more information about autoconfiguration and duplicate address detection, see the "Implementing IPv6 Addressing
and Basic Connectivity" chapter of Cisco IOS IPv6 Configuration Library on Cisco.com.
IPv6 Applications
The switch has IPv6 support for these applications:

Ping, traceroute, Telnet, TFTP, and FTP

Secure Shell (SSH) over an IPv6 transport

HTTP server access over IPv6 transport

DNS resolver for AAAA over IPv4 transport

Cisco Discovery Protocol (CDP) support for IPv6 addresses
For more information about managing these applications, see the "Managing Cisco IOS Applications over IPv6" chapter
and the "Implementing IPv6 Addressing and Basic Connectivity" chapter in the Cisco IOS IPv6 Configuration Library on
Cisco.com.
Dual IPv4 and IPv6 Protocol Stacks
You must use the dual IPv4 and IPv6 template to allocate ternary content addressable memory (TCAM) usage to both
IPv4 and IPv6 protocols.
Figure 84 shows a router forwarding both IPv4 and IPv6 traffic through the same interface, based on the IP packet and
destination addresses.
Figure 84 Dual IPv4 and IPv6 Support on an Interface
Use the dual IPv4 and IPv6 switch database management (SDM) template to enable dual-stack environments (supporting
both IPv4 and IPv6).
The dual IPv4 and IPv6 templates allow the switch to be used in dual-stack environments.

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 applies IPv4 QoS and ACLs in hardware. IPv6 packets are not supported.

In dual IPv4 and IPv6 environments, the switch applies IPv4 QoS and ACLs in hardware.

IPv6 QoS and ACLs are not supported.

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.
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.
IPv4
10.1.1.1
IPv6
3ffe:yyyy::1
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