IPV4 to IPV6: Transition

One problem in transition from <a href="http://ipv4-ipv6.blogspot.com/" target="_blank">IPv4 to IPv6</a> completely is that IPv6 
is not backward compatible.  This results in a situation where either a 
site is on IPv6 or it is not.  Unlike an implementation of new 
technology where the newer one is backward compatible so the older 
system can still work with the newer without any additional changes.<br />
To overcome this short-coming, there exist few technologies which can be used in slow and smooth transition from IPv4 to IPv6:<br />
<h2>
Dual Stack Routers</h2>
A router can be installed with both IPv4 and IPv6 addresses 
configured on its interfaces pointing to the network of relevant IP 
scheme.<br />
<figure>
<img caption="Dual Stack Router" src="http://www.tutorialspoint.com/ipv6/images/dual_stack_router.jpg" />
<figcaption align="center">[<i>Image: Dual Stack Router</i>]</figcaption>
</figure>In above diagram, a Server which is having IPv4 as well as IPv6 
address configured for it now can speak with all hosts on IPv4 network 
and IPv6 network with help of Dual Stack Router.  Dual Stack Router, can
 communicate with both networks and provides a medium for hosts to 
access Server without changing their respective IP version.<br />
<h2>
Tunneling</h2>
In a scenario where different IP versions exist on intermediate path 
or transit network, tunneling provides a better solution where user’s 
data can pass through a non-supported IP version.<br />
<figure>
<img caption="Tunneling" src="http://www.tutorialspoint.com/ipv6/images/tunneling.jpg" />
<figcaption align="center">[<i>Image: Tunneling</i>]</figcaption>
</figure>The above diagram depicts how two remote IPv4 networks can 
communicate via Tunnel, where the transit network was on IPv6.  Vice 
versa is also possible where transit network is on IPv6 and remote sites
 which intends to communicate, are on IPv4.<br />
<h2>
NAT Protocol Translation</h2>
This is another important method of transition to IPv6 by means of a 
NAT-PT (Network Address Translation – Protocol Translation) enabled 
device.  With help of NAT-PT device, actual conversion happens between 
IPv4 and IPv6 packets and vice versa.  See the diagram below:<br />
<figure>
<img caption="NAT-PT" src="http://www.tutorialspoint.com/ipv6/images/nat.jpg" />
<figcaption align="center">[<i>Image: NAT - Protocol Translation</i>]</figcaption>
</figure>

<br />
A host with IPv4 address sends a request to IPv6 enabled Server on 
Internet which does not understand IPv4 address.  In this scenario, 
NAT-PT device can help them communicate.  When IPv4 host sends a request
 packet to IPv6 Server, NAT-PT device/router, strips down the IPv4 
packet, removes IPv4 header and adds IPv6 header and passes it through 
the Internet.  When a response from IPv6 Server comes for IPv4 host, the
 router does vice versa.<br />
<span style="background-color: #edf4ff; color: #888888; font-family: Arial, Helvetica, sans-serif; font-size: 13px;">http://ipv4-ipv6.blogspot.com/2014/07/one-problem-in-transition-from-ipv4-to.html</span>

Transition From IPv4 to IPv6

Tukiyooo 0 IPv4, IPv4/IPv6, IPv6, Transition 01:04

One problem in transition from IPv4 to IPv6 completely is that IPv6 is not backward compatible. This results in a situation where either a site is on IPv6 or it is not. Unlike an implementation of new technology where the newer one is backward c… Read more »

Transition From IPv4 to IPv6

ADV

Populars

Arsip Blog