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This Best Practices document aims to provide IPv6 Address allocation guidelines that a network operator can follow while planning the IPv6 subnetting for its network (based on the issues faced and learning’s from IPv6 implementation in NKN and NIC network).


Best Current Practice:

1. Subnetting

        IPv6 addresses generally written in Hex format. Each Hex number represents 4 bit, commonly known as nibble. A nibble boundary is a network mask that aligns on a 4-bit boundary. Subnetting the v6 address at nibble boundary improves efficiency and make it easier to understand for humans* (Machine will anyway read it binary format).

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         For e.g.:-                       

 

2405:8A00:0:1::/64

2405:8A00:0:1::0/126

2405:8A00:0:1::4/126

(snip)

2405:8A00:0:1::C/126

2405:8A00:0:1::10/126

(snip)

2405:8A00:0:1::1C/126

 

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