HP-UX IPv6 Transition Mechanisms White Paper

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8. Deployment Scenario
An organization is expanding its operations and starting a new branch office. The organization is short
of globally unique IPv4 addresses and prefers not to use private IPv4 addresses. The organization
decides to use IPv6 in the new branch office to take advantage of new IPv6 capabilities and to be in the
forefront of new technology.
The main requirement of the organization is its new branch office should be able to communicate with
services available in the IPv4 networked main office and other branch offices. To facilitate the
communication, the organization is willing to upgrade some nodes in the main office and branch office
as long as the upgrade does not disrupt existing operations.
IPv4 network
Host M2
Router R1
Host M1
Host M3
Host M5
Host M6
Router M4
Host A1
Router R2
Host A2
Host A3
Host A5
Host A6
Router A4
Main officeBranch A
Figure 6: Initial Organization topology
Figure 6 illustrates the initial topology of an organization consisting of a main office and branch office A
connected by IPv4.
The organization should perform the following pre-deployment tasks before setting up the new branch
office B with native IPv6 support:
• Acquire an IPv6 prefix: The organization should acquire global unicast prefix from its service
provider.
• DNS Infrastructure: The organization should upgrade its DNS Infrastructure to support IPv4 A
records and IPv6 AAAA records.
• Required applications upgrade: The organization should identify the existing office applications
that must be made IPv6-aware so they can communicate with existing peer IPv4 applications in the
main office and other branch office and with IPv6 applications in new branch office.
• Required nodes upgrade: The organization should identify which nodes must be upgraded to dual
stack in the existing infrastructure to facilitate communication between the new branch office and
existing offices.
For example, assume that the employees in the new branch office need access to the payroll application
running on server M3 in main office, accounting applications on servers A1 and A3 in branch office A.
To successfully communicate,
- The payroll application and accounting application must be made IPv6-aware.
- The server M3 in the main office, servers A1 and A3 in branch office A should be upgraded to dual
stack.
- The router A4 should be upgraded to dual stack.