IPv6 Subnetting

[adiabymounagroup-com AMARA]

hello can you please explain to me how 46%16=14 ??

[OLALEKAN SOBANKE]

This question is not clear can you expantiate more

[OLALEKAN SOBANKE]

Subnetting is one of the key topic and need to be carefully and deliberately learnt.

[samson Mawisire]

Please clarify the question, give more context

[SAYID-ALI MOALLIM BULE ALI]

can help me the slide session two?

I confuse subnetting so i want short format of subnetting ipv6 can u help me.

[samson Mawisire]

In IPv6, subnetting is handled using CIDR notation (Classless Inter-Domain Routing) and does not use subnet masks like IPv4. The key to “short format” is using the slash (/) followed by a decimal number representing the prefix length (number of network bits).

[Madalitso Cheyo]

IPv6 subnetting works on the same fundamental principle as IPv4; borrowing bits from the host portion to create smaller network segments, but the vast address space changes the approach entirely.

The Foundation: Always Start with /64. Every end-user subnet in IPv6 should be a /64, regardless of how many hosts it contains. This is not a recommendation but a requirement for SLAAC, EUI-64, and Neighbor Discovery to function correctly. Unlike IPv4, there is no need to size subnets to the number of hosts.

The Subnetting Space. A typical organization receives a /48 prefix, leaving 16 bits (bits 49–64) for subnetting. This allows for 65,536 /64 subnets. Subnetting simply means deciding how to assign those 16 bits hierarchically across your organization.

How to Subnet. To create subnets, bits are borrowed from the subnet field. For example, borrowing 4 bits from a /48 creates 16 possible /52 blocks. Each /52 can then be further divided into smaller blocks down to /64. The formula is always 2ⁿ, where n is the number of borrowed bits.

Point-to-Point Links. Router-to-router links are commonly assigned /127 prefixes (as per RFC 6164) instead of /64, since only two addresses are needed. /128 is used for loopback addresses, identifying a single device.

Key Subnetting Rules. Never subnet below /64 for end-user networks. Plan hierarchically by assigning larger blocks to regions or sites, then subdividing internally. Always leave room for growth by allocating in powers of two and leaving gaps between assignments.

[Vincent Onyango]

well detailed explanation.