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The internet and telecoms industries have been promoting the migration to IPv6 for the past few years. IPv6-compliant addresses have been available since 1999, but 2011 has witnessed a strong push for the transition to IPv6 from the legacy IPv4 addressing scheme.
Many industry players - telcos, ISPs, IP backbone providers, Web 2.0 players - have been pressuring enterprises to prepare for the move; the recent World IPv6 Day (8 June 2011) is one example, with suppliers positioning IPv6 as the ""next-generation internet"". But many enterprise customers seem to have little interest in making the transition.
For enterprises, the first course of action for is to recognise that you will be moving to IPv6, even if you have IPv4 addresses available. Having many years of IPv4 addresses in inventory will not protect against having to move to IPv6 sooner than you think.
Treat this as you would your disaster recovery plan - create an IPv6 transition plan as soon as possible. This is not just a non-critical, ""make busy"" project; it will become critical to your internal and external communication, especially if you hit a wall that either blocks your employees or your customers from doing business. The plan should have phases so that you can address the IPv6 transition requirement by business unit, services, or region.
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