Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

IPv4 carried over ( or inside ) a IPv6 network

Hi all,

Any ideas as to where I could find some good resources on how to carry IPv4 inside of a IPv6 network? Or, as well, maybe doing IPv4-to-IPv6-to-IPv4 translation. I am curious about how one could build a 100% IPv6 network, and yet still carry the 'legacy' IPv4 traffic of customers and the Internet of course. Any resources as well on BGP and OSPF in an IPv6 network would be much appreciated.




Re: IPv4 carried over ( or inside ) a IPv6 network

Since there has been no response to your post, it appears to be either too complex or too rare an issue for other forum members to assist you. If you don't get a suitable response to your post, you may wish to review our resources at the online Technical Assistance Center ( or speak with a TAC engineer. You can open a TAC case online at

If anyone else in the forum has some advice, please reply to this thread.

Thank you for posting.


Re: IPv4 carried over ( or inside ) a IPv6 network

Assuming you know where to access RFC's

RFC 1933 is a good place to start. This document goes over how IPV4 and IPV6 can operate together (V6 and V4 Tunneling, etc)

RFC 2473 - Generic Packet Tunneling in IPv6 Specification

RFC 2463 - Internet Control Message Protocol (ICMPv6) for the IPv6 Specification

RFC 2491 - IPv6 over Non-Broadcast Multiple Access (NBMA) networks

RFC 2492 - IPv6 over ATM Networks

For IPV6 BGP information go to and search on the following:


RFC 2283 - Multiprotocol Extensions for BGP-4

OSPF support of IPV6

rfc2740 - OSPF for IPv6

Hope this helps,


New Member

Re: IPv4 carried over ( or inside ) a IPv6 network

Hey Don,

It certainly does help...thanks. I will dive into this.


Vaughn Munden, CCNP