IV.4 TECHNIQUES MECHANISM
The objective of this section is to identify the different
transition mechanisms options available to a network while migrating from the
IPv4 to IPv6. These mechanisms are intended to ensure interoperability between
IPv4 and IPv6.
IV.4.1 Dual Stack technique
The objective of dual stack step is to guarantee a smooth
transition. In our study we decided to test dual stack. This technique performs
a full network software upgrade to run the two separate protocol stacks. It is
the simplest approach to introduce IPv6 without changing applications. It
supports IPv4 and IPv6 simultaneously, maintaining old IPv4 applications and
adding new ones to communicate with IPv6 nodes. The dual stack is for end
system.
Figure 7: Dual Stack
diagram
Source: Own drawing
IV.4.1.1 Dual-stack
configuration
Dual-stack configuration is simple. We first enabled both
routers to act as IPv6 router. We then configured with IPv6 and IPv4 addresses.
IPv6 configuration is different to IPv4 configuration; it has plenty option.
IPv6 does not use the subnet mask, it use a slash followed by prefix this
replace the big notation in IPv4 that use subnet mask; IPv6 can also be
configured automatically using stateless autoconfiguration on an interface. We
finally save the configuration. Appendix A gives a dual-stack configuration.
The dual stack configuration helped us to set up a Local Area
Network to test our Network test lab.
IV.4.1.2 Dual-stack Ping
results
Our dual-stack ping is test connectivity between two routers
that acting as IPv6/IPv4 node that obtains the IPv4 and IPv6 Round Trip Time
delays for a set of target nodes by running ping and ping6. From the dual-stack
ping results, we identified the percentage of dual-stack nodes reachable. The
result of this test shows that we success configuring a dual-stack
configuration, we have localized IP connectivity.
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