Why is IPv6 important to service providers?
For Internet service operators, content providers and other entities that rely on Internet numbering allocations, it will become increasingly difficult and expensive (and eventually prohibitively so) to obtain new IPv4 address space to grow their networks. The cost and complexity associated with keeping track of and managing remaining IPv4 address space efficiently will also increase. Therefore, network operators and enterprises will need to implement IPv6 in order to ensure long-term network growth and global connectivity.