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IPv6は８個のffff
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An IPv6 (Normal) address has the following format:

y : y : y : y : y : y : y : y

where y is called a segment and can be any hexadecimal value between 0 and FFFF.
The segments are separated by colons - not periods.
An IPv6 normal address must have eight segments,

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"::"で短縮
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however a short form notation can be used in the Tape Library Specialist Web interface for segments
that are zero, or those that have leading zeros.
The short form notation can not be used from the operator panel.

The following list shows examples of valid IPv6 (Normal) addresses:
2001 : db8: 3333 : 4444 : 5555 : 6666 : 7777 : 8888
2001 : db8 : 3333 : 4444 : CCCC : DDDD : EEEE : FFFF
: : (implies all 8 segments are zero)
2001: db8: : (implies that the last six segments are zero)
: : 1234 : 5678 (implies that the first six segments are zero)
2001 : db8: : 1234 : 5678 (implies that the middle four segments are zero)
2001:0db8:0001:0000:0000:0ab9:C0A8:0102 (This can be compressed to eliminate leading zeros, as follows: 2001:db8:1::ab9:C0A8:102 )
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