As of 3 February 2011, the central pool of available IPv4 addresses managed by the Internet Assigned Numbers Authority (IANA) is empty.
It means that the central pool of available IPv4 addresses managed by the IANA (www.iana.org/numbers) is empty. As of February 2011, most of the four billion IPv4 addresses available have been allocated for use or reserved for a specific technical purpose.
It is recommended to change to IPv6 in the near future.
Click HERE for more information [pdf].
One of the first IEC 61850 products that is able to support IPv4 and IPv6 is the Beck Chip - even it is not yet required in IEC 61850-8-1 Edition 2 FDIS.
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