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Configuring an IPv6 Tunnel
IPv6 Tunnel Overview
Every network administrator needs to have a strategy to address the transition to the IPv6 Internet. Various
transition mechanisms
have been defined that are intended to make it as easy as possible for organizations to get
on the IPv6 Internet using their current IPv4 network infrastructure. For many organizations, the easiest and
fastest way to get applications up and running on the IPv6 Internet is to use a transition mechanism called an
IPv6
tunnel
.
One of the most common issues when an organization begins to support IPv6 is how to allow IPv6 enabled
devices to communicate over those portions of the network that are not IPv6 enabled. This can include both
portions of a corporate intranet as well as Internet connections managed by an Internet Service Provider (ISP) that
does not yet provide IPv6 connectivity.
An
IPv6 tunnel
solves this issue by encapsulating IPv6 packets inside IPv4 packets for transmission over IPv4-
only connections.
An IPv6 tunnel is obtained through an IPv6
tunnel broker
. An IPv4 connection is established between a system at
your site (in this case, an Equalizer) and a system at the tunnel broker’s site. Clusters on Equalizer are assigned
IPv6 addresses within the subnet assigned by the tunnel broker. Clients can then access the IPv6 cluster address
through the tunnel.
There are a number of tunnel brokers providing IPv6 tunnels to various geographical regions. In general, you should
pick a tunnel broker that maintains tunnel servers that are geographically close to your location for best
performance.
This chapter describes how you can set up an IPv6 tunnel using the Hurricane Electric IPv6 Tunnel Broker.
Coyote Point has partnered with Hurricane Electric (HE), one of the leading IPv6 tunnel brokers, to provide an
easy way to configure a tunnel that uses the
6in4tunneling protocol
. Note that a 6in4 tunnel from any tunnel broker
can be used and requires the same basic commands on Equalizer to establish your tunnel -- only the required
setup on the tunnel broker’s website will be different. Hurricane Electric offers an easy to use web interface that
allows you to request and configure a tunnel usually within a few hours.
Note that a number of different tunneling protocols exist, and the tunneling protocols supported vary between
tunnel brokers, so check a tunnel broker’s website to be sure they support 6in4 tunnels before you request one.
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