IP Switching: Cisco Express Forwarding Configuration Guide, Cisco IOS Release 15S
IPv6 CEF-Switched Tunnels
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IPv6 CEF-Switched Tunnels

IPv6 CEF-Switched Tunnels

Cisco Express Forwarding switching can be used for IPv6 manually configured tunnels.

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table at the end of this module.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/​go/​cfn. An account on Cisco.com is not required.

Information About IPv6 CEF-Switched Tunnels

IPv6 Manually Configured Tunnels

A manually configured tunnel is equivalent to a permanent link between two IPv6 domains over an IPv4 backbone. The primary use is for stable connections that require regular secure communication between two edge devices or between an end system and an edge device, or for connection to remote IPv6 networks.

An IPv6 address is manually configured on a tunnel interface, and manually configured IPv4 addresses are assigned to the tunnel source and the tunnel destination. The host or device at each end of a configured tunnel must support both the IPv4 and IPv6 protocol stacks. Manually configured tunnels can be configured between border devices or between a border device and a host. Cisco Express Forwarding switching can be used for IPv6 manually configured tunnels, or Cisco Express Forwarding switching can be disabled if process switching is needed.

Additional References

Related Documents

Related Topic

Document Title

IPv6 addressing and connectivity

IPv6 Configuration Guide

Tunnels

Interface and Hardware Component Configuration Guide

Cisco IOS commands

Cisco IOS Master Commands List, All Releases

IPv6 commands

Cisco IOS IPv6 Command Reference

Cisco IOS IPv6 features

Cisco IOS IPv6 Feature Mapping

Standards and RFCs

Standard/RFC

Title

RFCs for IPv6

IPv6 RFCs

MIBs

MIB

MIBs Link

To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL:

http:/​/​www.cisco.com/​go/​mibs

Technical Assistance

Description

Link

The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password.

http:/​/​www.cisco.com/​cisco/​web/​support/​index.html

Feature Information for IPv6 CEF-Switched Tunnels

The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/​go/​cfn. An account on Cisco.com is not required.

Table 1 Feature Information for IPv6 CEF-Switched Tunnels

Feature Name

Releases

Feature Information

CEFv6 Switching for 6to4 Tunnels

12.2(28)SB

12.2(25)SG

12.2(33)SRA

12.2(18)SXE

12.2(12)T

12.4

15.0(1)S

Cisco IOS XE 3.9(S)

Cisco Express Forwarding switching can be used for IPv6 manually configured tunnels.

IPv6 Switching: CEFv6 Switched Automatic IPv4-Compatible Tunnels

12.2(2)T

12.2(52)SG

12.2(33)SRA

12.2(17a)SX1

Cisco IOS XE 3.9(S)

IPv6 supports this feature.

IPv6 Switching: CEFv6 Switched Configured IPv6 over IPv4 Tunnels

12.2(13)T

12.2(52)SG

12.2(33)SRA

12.2(17a)SX1

Cisco IOS XE 3.9(S)

IPv6 supports this feature.

IPv6 Switching: CEFv6 Switched ISATAP Tunnels

12.2(15)T

12.2(25)SG

3.2.0SG

15.0(2)SG

12.2(33)SRA

12.2(17a)SX1

Cisco IOS XE 3.9(S)

IPv6 supports this feature.