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Does IPv6 need subnetting?
If you are given a /48 subnet to work with, you will have more than enough spaces to work with i.e. you get 65536 subnets with 18,446,744,073,709,551,616 hosts per subnet. So, in all, subnetting is necessary in IPv6, but not for the reasons why we did it with IPv4.
What is IPv6 subnetting?
IPv6 addresses use 128 bits to represent an address which includes bits to be used for subnetting. The second half of the address (least significant 64 bits) is always used for hosts only. Therefore, there is no compromise if we subnet the network.
What is a 255.255 255.0 subnet?
A subnet mask of 255.255. 255.0 allows for close to 256 unique hosts within the network (since not all 256 IP addresses can be used). This is the default subnet mask used by Class B networks and provides up to 65,536 IP addresses (256 x 256). The largest Class A networks use a subnet mask of 255.0.
Does IPv6 have a subnet mask?
IPv6 does not use subnet masks but does have a means of indicating subnets that is similar to CIDR . IPv6 routing is based on a prefix length as well where the prefix length represents the bits that have fixed values or are the bits of the network identifier.
What is the subnet mask for IPv6?
Subnet masks (IPv4) and prefixes (IPv6) identify the range of IP addresses that make up a subnet, or group of IP addresses on the same network. For example, a subnet can be used to identify all the machines in a building, department, geographic location, or on the same local area network (LAN).
Why do we need tunneling in IPv6?
The above diagram depicts how two remote IPv4 networks can communicate via a Tunnel, where the transit network was on IPv6.
How many bits long is an IPv6 subnet id?
IN IPv6, the subnet ID defines an administrative subnet of the network and is up to 16 bits in length. You assign a subnet ID as part of IPv6 network configuration. You assign a subnet ID as part of IPv6 network configuration.