Interface and Hardware Component Configuration Guide, Cisco IOS Release 15M&T
IPv6 Rapid Deployment
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Contents

IPv6 Rapid Deployment

Last Updated: December 4, 2012

The IPv6 rapid deployment feature allows a service provider to provide a unicast IPv6 service to customers over its IPv4 network by using encapsulation of IPv6 in IPv4.

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 Rapid Deployment

IPv6 Rapid Deployment Tunnels

The IPv6 Rapid Deployment (6RD) feature is an extension of the 6to4 feature. The 6RD feature allows a service provider to provide a unicast IPv6 service to customers over its IPv4 network by using encapsulation of IPv6 in IPv4.

The main differences between 6RD and 6to4 tunneling are as follows:

  • 6RD does not require addresses to have a 2002::/16 prefix; therefore, the prefix can be from theservice provider's own address block. This function allows the 6RD operational domain to be within the SP network. From the perspective of customer sites and the general IPv6 Internet connected to a 6RD-enabled service provider network, the IPv6 service provided is equivalent to the native IPv6.
  • All 32 bits of the IPv4 destination need not be carried in the IPv6 payload header. The IPv4 destination is obtained from a combination of bits in the payload header and information on the router. Furthermore, the IPv4 address is not at a fixed location in the IPv6 header as it is in 6to4.

How to Configure IPv6 Rapid Deployment

Configuring 6RD Tunnels

Perform this task to configure 6RD tunnels.

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    interface tunnel tunnel-number

4.    tunnel source {ip-address| interface-t ype interface-number}

5.    tunnel mode ipv6ip [6rd | 6to4 | auto-tunnel | isatap]

6.    tunnel 6rd prefix ipv6-prefix / prefix-length

7.    tunnel 6rd ipv4 {prefix-length length} {suffix-length length


DETAILED STEPS
 Command or ActionPurpose
Step 1
enable


Example:

Router> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Router# configure terminal

 

Enters global configuration mode.

 
Step 3
interface tunnel tunnel-number


Example:

Router(config)# interface tunnel 1

 

Specifies a tunnel interface and number, and enters interface configuration mode.

 
Step 4
tunnel source {ip-address| interface-t ype interface-number}


Example:

Router(config-if)# tunnel source Ethernet2/0

 

Specifies the source interface type and number for the tunnel interface.

 
Step 5
tunnel mode ipv6ip [6rd | 6to4 | auto-tunnel | isatap]


Example:

Router(config-if)# tunnel mode ipv6ip 6rd

 

Configures a static IPv6 tunnel interface.

 
Step 6
tunnel 6rd prefix ipv6-prefix / prefix-length


Example:

Router(config-if)# tunnel 6rd prefix 2001:B000::/32

 

Specifies the common IPv6 prefix on IPv6 rapid 6RD tunnels.

 
Step 7
tunnel 6rd ipv4 {prefix-length length} {suffix-length length


Example:

Router(config-if)# tunnel 6rd ipv4 prefix-length 16 suffix 8

 

Specifies the prefix length and suffix length of the IPv4 transport address common to all the 6RD routers in a domain.

 

Configuration Examples for IPv6 Rapid Deployment

Example: Configuring 6RD Tunnels

The following example shows the running configuration of a 6RD tunnel and the corresponding output of the show tunnel 6rd command: 

interface Tunnel1 
 ipv6 address 2001:B000:100::1/32 
 tunnel source Ethernet2/1 
 tunnel mode ipv6ip 6rd
 tunnel 6rd prefix 2001:B000::/32
 tunnel 6rd ipv4 prefix-len 16 suffix-len 8 
end
Router# show tunnel 6rd tunnel 1 
Interface Tunnel1: 
  Tunnel Source: 10.1.1.1 
  6RD: Operational, V6 Prefix: 2001:B000::/32 
       V4 Common Prefix Length: 16, Value: 10.1.0.0 
       V4 Common Suffix Length: 8, Value: 0.0.0.1

Additional References

Related Documents

Related Topic Document Title

IPv6 addressing and connectivity

IPv6 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 Rapid Deployment

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 1Feature Information for IPv6 Rapid Deployment
Feature Name Releases Feature Information

IP Tunneling: 6RD IPv6 Rapid Deployment

15.1(3)T

The 6RD feature allows a service provider to provide a unicast IPv6 service to customers over its IPv4 network by using encapsulation of IPv6 in IPv4.

The following commands were introduced or modified: tunnel 6rd ipv4, tunnel 6rd prefix, tunnel mode ipv6ip, tunnel source.

Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of Cisco trademarks, go to this URL: www.cisco.com/go/trademarks. Third-party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (1110R)

Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental.

© 2012 Cisco Systems, Inc. All rights reserved.