OverviewWith the number of IPv4 addresses almost completely depleted, the implementation of IPv6 has become a priority for many organizations. However, it is not all that feasible to just switch everything over to IPv6 without some type of transition. This article takes a look at the methods that can be used to transition to IPv6 from IPv4. Show
IPv6 Transition MethodsThere are a couple of main methods that can be used when transitioning a network from IPv4 to IPv6; these include:
Dual StackThe simplest approach when transitioning to IPv6 is to run IPv6 on all of the devices that are currently running IPv4. If this is something that is possible within the organizational network, it is very easy to implement. However, for many organizations, IPv6 is not supported on all of the IPv4 devices; in these situations other methods must be considered. TunnelingMost people with some networking knowledge are familiar with the concept of tunneling; a given packet is encapsulated into a wrapper than enables its transport from a source to destination transparently where it is decapsulated and retransmitted. There are a number of different tunneling methods that exist for IPv6, many that are integrated as part of Cisco and other manufactures certification tests. The following list shows the different available tunneling methods:
TranslationUnlike the above discussed tunneling methods, a translation method provides a way to translate IPv6 to IPv4 traffic and vice versa. When using translation, the traffic is not encapsulated but is converted to the destination type (be that IPv4 or IPv6). There are two methods that are typically used with translated IPv6 networks; these include:
SummaryOne of the most important parts of implementing IPv6 is being able to gracefully transition from IPv4. This in itself is a giant undertaking and cannot simply happen in a short amount of time. The methods discussed in this article can each be used as options when beginning an IPv6 deployment and should each be looked over for applicability depending on the specific requirements of an organization. Hopefully the information contained within this article will provide the reader a starting point to this process. Which of the following is the primary method for transmitting IPv6 traffic over IPv4 network?B. Correct: Tunneling is a method for encapsulating IPv6 traffic within IPv4 datagrams.
How does IPv6 travel over IPv4 networks?IPv6 over IPv4 tunnels are point-to-point tunnels made by encapsulating IPv6 packets within IPv4 headers to carry them over IPv4 routing infrastructures. This allows isolated IPv6 end systems and devices to communicate without the need to upgrade the IPv4 infrastructure that exists between them.
Which of the following protocols are used to allow IPv6 to travel over an IPv4 network?Teredo is outlined in RFC 4380 and allows IPv6 local area networks to tunnel over IPv4 networks, by encapsulating IPv6 packets within UDP.
Which two technologies can be used to tunnel IPv6 traffic over IPv4 networks choose two?For the transition from IPv4 to IPv6 and vice versa, there are three prominent transition mechanisms are used. They are Dual Stack, Tunneling and Translation.
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