ipv4 and ipv6 network

There are three ways for IPv4 and IPv6 to coexist. Those ways are Tunneling, Dual Stacking and NATting.

Dual Stacking is the easies to understand. You just provide your interfaces with an IPv6 and an IPv4 address.

Tunneling is exactly what is sounds like, and IPv4 packet is encapsulated into an IPv6 packet or vice versa.

Finally, NATting is again exactly what is sounds like. An IPv4 address is NATted into an IPv6 address or vice versa.

Dual Stacking is by far the most common. All Windows version vista and above use it (including server 2008 and beyond).

Thanks,
S.

If you read this and all the links you will know a lot more about IPv6 than I do!
http://en.wikipedia.org/wiki/IPv6

Thank you for the response. But my question is: is there a physical IPv6 network? If yes then how does it connect to the existing IPv4 current Internet?

No. It uses the same cabling as IPv4, only equipment is different - IPv6 capable.
In this days most of routers and other networking equipment have firmware that is compatible with both versions.

IPv6 is a protocol defined at the Network Layer of the OSI Model. IPv6 can operate on various Layer 2 Protocols (Ethernet, PPP, DSL, etc.). The actual cable would be a Layer 1 construct usually defined along with the Layer 2 Protocol.

The short answer is that it doesn't matter.

Thanks,
S.

I understand what IPv6 is. But are there two networks out there? We know that we currently have IPv4 network (the Internet). But do we have a IPv6 network (the Internet2)? If we do then does any one know where I can see a map or network diagram of thoses two networks.

The reason I ask is because I came across the gog6 tunnel (http://samsclass.info/ipv6/proj/he-cert-win.html). So to me it ooks like there are 2 separate network and to get to the ipv6 network, I need to go through some sort of gateways. Thanks

It may appear to be two separate networks, but it really isn't. Think about it this way, IPv4 and IPv6 exist on the Network Layer of the OSI model, but there are 6 other layers that were completely unaffected.

A web server on the internet would exist at layer 7, but it can be accessed by device with an IPv4 address, and IPv6 address or a device that has both. The server itself may also have two addresses (and IPv4 and an IPv6).

Thanks,
S.

Is anybody familiar with gogo6?

IPv6 is the same physical network as IPv4, in most cases.

It is just a matter of two types of "addressing".

You can compare it with Skype and Google Talk - it is using the same network, but since addressing is different, you can not call from one network to the other.

However, two PCs may be running both Skype and Google Talk, so you can still call from PC to PC.

In the same way, your PC may be running both IPv4 and IPv6, and a web server may also be running both, so you may be able to get to a web site via any either IPv4 or IPv6.

SebastianAbbinanti & pergr,

Pretty awesome inputs you have there. Do you links to the information that you just shared with me.

You said that "IPv6 has taken a strong foothold at the university level", do you have specific examples of university deploying IPv6?

Thanks

I am just wondering why the universities have strong foothold in IPv6. Any thoughts?

pergr,

That makes sense. Thank you.