Global Routing Prefix vs Subnet ID vs Interface ID (IPv6 address)
In: Technology
The routing prefix is the IPv6 prefix that’s unique to a particular site such as a business or home. It can be 48 to 64 bits. For businesses 48 bits is recommended and for a home user 56 bits.
The subnet ID allows the business or home user to have IPv6 in multiple LANs. A 48 bit prefix can be used on up to 65536 LANs, a 56 bit prefix on 256 LANs and a 64 bit prefix on one single LAN.
The routing prefix together with the subnet ID is 64 bits.
The interface ID is the remaining 64 bits which are used for addressing within each LAN.
https://en.wikipedia.org/wiki/IPv6_address#Unicast_and_anycast_address_format
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