Tag Archives: Neighbor Discovery Protocol

IPv6: No ARP


ipv6-no-arp

You can omit unused zeros for your IPv6 addresses. Now, leading zeros can also be left off within the group. Example:

2001  :  DB8  :  21  :  111  :  0  :  0  :  0  :  1/64    will become,

2001  :  DB8  :  21  :  111  :  :  1/64 , meaning there are zeros inside those two colon (:)

You can figure out how many 16 bits missing by counting how many 16 bits left. You notice that there are 5 of them and we know that they are 8 all in all… So, to make an eight groups from 5, how many 16 bits zeros omitted?

8 – 5 = 3 , A primary operation!

So, there are 3 bits omitted… 2001  :  DB8  :  21  :  111  :  0  :  0  :  0  :  1/64

We have learned that IPv4 uses ARP to discover network, but in IPv6???… no ARP at all,… It uses a protocol called Neighbor Discovery Protocol… 😉

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