About this interactive
From the lesson: tunneling eases the move from IPv4 to IPv6.
- **IPv6 over IPv4**: your network runs IPv6, but the provider between your sites carries only IPv4. The router at the tunnel's start wraps each IPv6 packet in an IPv4 header; the far end takes it off and delivers IPv6.
- **IPv4 over IPv6**: the provider mandates IPv6, but some of your traffic is still IPv4, so the IPv4 packets are wrapped in IPv6.
The outer header is always the provider's version.
What you'll learn
- Decide which way a tunnel between IP versions runs: IPv6 over IPv4 where the provider carries only IPv4, IPv4 over IPv6 where it carries only IPv6
- Explain why the tunnel helps the move from IPv4 to IPv6: each side keeps its own version while the provider carries another
Aligned to
Cisco CCNA
1.9
Describe IPv6 address types
5.5
Describe IPsec remote access and site-to-site VPNs
Key terms
- Tunneling
- A transition mechanism that encapsulates IPv6 packets within IPv4 headers (or vice versa) to carry traffic across a network that uses a different IP version.
- Encapsulation
- The process of wrapping data with protocol headers as it passes down the layers of the OSI model.
- Dual Stack
- A network configuration that enables a device to operate with both IPv4 and IPv6 addresses simultaneously on the same interface.
Topics
Tunneling
Ipv6
Ipv6 Transition
Encapsulation
Interactive
Streak Sort
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