Impact of IPv6 on VoIP


Higher bandwidth requirements are the most overlooked impact of planning and migrating business VoIP networks from IPv4 to IPv6.

IPv6 migration has additional implementation costs but with over 40 Request for Comments documents still under debate it is likely not all requests will make the implementation list for the internet but will be utilized within private and corporate IP networks.

There are a number of migration issues that businesses will need to plan for when migrating to IPv6 including the possibility of running dual IPv6 & IPv4 systems during the transition, port sharing and signaling protocols conflicts and upgrading all current gateways, IP phones and IP PBXs to IPv6.

Most experts agree the expanded IPv6 address header field from 32 to 128 bits will likely be the last expansion ever needed.

With a minimum of 40 bytes, IPv6 headers have capabilities of being extended and expanded to include routing instructions, destination options and hop-by-hop options that make bandwidth monitoring and utilization much more manageable that the current IPv4 standards.

The global transition from IPv4 to IPv6 is estimated to take between 5 and 10 years depending upon industry adoption rate and levels of acceleration; mainly due to the existing investments in technology stacks and infrastructure capabilities of IPv4.

As bandwidth continues to become cheaper for businesses to acquire, more and more companies will begin to plan their inevitable VoIP migration from IPv4 to IPv6.

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