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Catalyst 2960 and 2960-S Switch Software Configuration Guide
OL-8603-09
Chapter 35 Configuring IPv6 Host Functions
Understanding IPv6
IPv6 Stateless Autoconfiguration and Duplicate Address Detection
The switch uses stateless autoconfiguration to manage link, subnet, and site addressing changes, such as
management of host and mobile IP addresses. A host autonomously configures its own link-local
address, and booting nodes send router solicitations to request router advertisements for configuring
interfaces.
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
On a Catalyst 2960 switch, you must use the dual IPv4 and IPv6 template to allocate ternary content
addressable memory (TCAM) usage to both IPv4 and IPv6 protocols.
Figure 35-1 shows a router forwarding both IPv4 and IPv6 traffic through the same interface, based on
the IP packet and destination addresses.
Figure 35-1 Dual IPv4 and IPv6 Support on an Interface
Use the dual IPv4 and IPv6 switch database management (SDM) template on a Catalyst 2960 switch to
enable dual stack environments (supporting both IPv4 and IPv6). For more information about the dual
IPv4 and IPv6 SDM template, see Chapter 8, “Configuring SDM Templates.”
The dual IPv4 and IPv6 templates on Catalyst 2960 switches allow the switch to be used in dual stack
environments.
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10.1.1.1
IPv6
IPv4