Tunneling Configuration; Introduction To Tunneling - HP 4800G Series Configuration Manual

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Tunneling Configuration

When configuring tunneling, go to these sections for information you are interested in:

Introduction to Tunneling

Tunneling Configuration Task List
Configuring IPv6 Manual Tunnel
Configuring 6to4 Tunnel
Configuring ISATAP Tunnel
Displaying and Maintaining Tunneling Configuration
Troubleshooting Tunneling Configuration
The tunnel interface number is in the A/B/C format, where A, B, and C represent the IRF member device
ID, the sub-slot number, and the tunnel interface number respectively. The value ranges of A and B vary
with devices. C is in the range of 0 to 126.
Introduction to Tunneling
The expansion of the Internet results in scarce IPv4 addresses. The technologies such as temporary
IPv4 address allocation and Network Address Translation (NAT) relieve the problem of IPv4 address
shortage to some extent. However, these technologies not only increase the overhead in address
resolution and processing, but also lead to upper-layer application failures. Furthermore, they will still
face the problem that IPv4 addresses will eventually be used up. Internet Protocol Version 6 (IPv6)
adopting the 128-bit addressing scheme completely solves the above problem. Since significant
improvements have been made in address space, security, network management, mobility, and QoS,
IPv6 becomes one of the core standards for the next generation Internet protocol. IPv6 is compatible
with all protocols except IPv4 in the TCP/IP suite. Therefore, IPv6 can completely take the place of IPv4.
Before IPv6 becomes the dominant protocol, networks using the IPv6 protocol stack are expected to
communicate with the Internet using IPv4. Therefore, an IPv6-IPv4 interworking technology must be
developed to ensure the smooth transition from IPv4 to IPv6. In addition, the interworking technology
should provide efficient, seamless information transfer. The Internet Engineering Task Force (IETF)
sets up the next generation transition (NGTRANS) working group to study problems about IPv4-to-IPv6
transition and efficient, seamless IPv4-IPv6 interworking. Currently, multiple transition technologies and
interworking solutions are available. With their own characteristics, they are used to solve
communication problems in different transition stages under different environments.
Currently, there are three major transition technologies: dual stack (RFC 2893), tunneling (RFC 2893),
and NAT-PT (RFC 2766).
Tunneling is an encapsulation technology, which utilizes one network protocol to encapsulate packets of
another network protocol and transfer them over the network. A tunnel is a virtual point-to-point
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