Describe the two main IPv4-to-IPv6 transition options, and complete the following IPv6 transition sentence:
“ _______where you can; _________where you must!”
The sentence is “Dual-stack where you can; tunnel where you must!”
Dual-stack method:
- Is an integration method in which a node has implementation and connectivity to both an IPv4 and IPv6 network.
- This is the recommended option and involves running IPv4 and IPv6 at the same time.
- Routers and switches are configured to support both protocols, with IPv6 being the preferred protocol.
6to4 tunneling method:
- Is an integration method in which an IPv6 packet is encapsulated within the IPv4 protocol.
- This method requires dual-stack routers.
- The dynamic 6to4 tunneling method automatically establishes the connection of IPv6 islands through an IPv4 network.
Other tunneling methods:
- Other tunneling protocols include NAT-PT, ISATAP tunneling, and Teredo tunneling.
- These tunneling protocols are complex and should be considered methods of last resort.
Exam with this question: EWAN v4 Chapter 7 Check Your Understanding: IP Addressing Services
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