TRANSITION FROM IPV4 TO IPV6 5
IPv6 transition mechanism can be explained as the technology whichenables internet transition from its current and initial IPv4infrastructure to internet protocol version 6 which is the routingsystem and successor address. The technologies are meant to allowworking of the IPv6 and IPv4 network since the two are not directlyinteroperable. For IPv6 to meet the technical criteria it ought tohave a guiding plan for transition from IPv4
When upgrading IPv4 to IPv6 the routers and host ought tointeroperate, the following is an overview of the transition fromIPv4 to IPv6. Transition requirement does not need any globalcoordination. The internet service provider and the site one isworking with can do at their pace. Moreover, the number of dependenceshould be minimized during transition this means that there is noneed to routers to IPv6 before upgrading the host (Beijnum, 2006).The challenges likely to be faced during rationale transition includerequired application of new IPv6 feature or lack of address space ofIPv4. IPv6 needs 100% compatibility for the present protocols.Lastly, there ought to be compatibility with existing feature duringthe transition.
Understanding the following terms is important when doing transitionfrom IPv4 to IPv6
IPv4 only node: this term is used to refer to a router or host node that only accepts to work with IPv4
IPv4/IPv6 node: this is a router or host node that implement both also referred to as dual stack
IPv6 only node: this only implements IPv6
IPv6 node: implement either IPv6 or IPv4/IPv6
IPv4 node: implement either IPv4 or IPv6/IPv4
6to4 router-this is any router boundary, which get configured using a pseudo interface of 6to4 on network connection of IPv4. The router acts as an endpoint to 6to4 tunnel that is used to forward packet by the router to other IPv6 site (Hagen, 2014).
6to4 host- this refers to any IPv6 host that has an interface which is configured with a derived address of 6to4.
Site- this is a piece of internet private topology that does not bear traffic for everybody or anybody. Site can span big geographical areas such as private multinational corporation network is one site.
Technologies used for a smooth slow transition.
Dual Stack Routers
erea router is installed on both IPv4 and IPv6 address and configurationdone on it interface thus directing the network to relevant IPscheme. (Hagino, 2004)
In this diagram the server with the help of Dual Stack Router canspeak with IPv4 network host and IPv6 network host since it has theiraddress configure to it. The Dual Stack Router provides a means foraccessing the server to the two hosts without having to change the IPversion. Moreover it communicates with the two networks.
This isused in a scenario involving more than one IP version on a transitnetwork or intermediate path it offer solutions where a non-supportedIP version of users data can pass through.
Thediagram demonstrates how Tunnel can be used by two remote IPv4 tocommunicate while the transits network is on IPv6. The vice versa iswhere the IPv4 is the transit network while IPv6 is the remotenetwork that intend to communicate (Lee & Mun, 2005).
Beijnum,I. (2006). Running IPv6. Berkeley, CA: Iljitsch van Beijnum.
Hagino,J. . (2004). IPv6 Network Programming. Burlington: Elsevier.
Hagen,S. (2014). IPv6 essentials. Sebastopol, CA: O`Reilly.
Lee, H.K., & Mun, Y. (2005). Understanding IPv6. New York:Springer Science+Business Media, Inc.