IPv6 Applications
The switch has IPv6 support for these applications:
•
Ping, traceroute, and Telnet
•
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 Cisco IOS IPv6 Configuration Library on
Cisco.com.
Dual IPv4 and IPv6 Protocol Stacks
On a Catalyst 2960-X switch, you must use the dual IPv4 and IPv6 template to allocate ternary content
addressable memory (TCAM) usage to both IPv4 and IPv6 protocols.
This figure shows a router forwarding both IPv4 and IPv6 traffic through the same interface, based on the IP
packet and destination addresses.
Figure 7: Dual IPv4 and IPv6 Support on an Interface
Use the dual IPv4 and IPv6 switch database management (SDM) template to enable IPv6 routing dual stack
environments (supporting both IPv4 and IPv6). For more information about the dual IPv4 and IPv6 SDM
template, see Configuring SDM Templates.
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 routes IPv4 packets and 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
hardware memory 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.
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
188
Information About Configuring IPv6 Host Functions
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