Subnets are denoted in CIDR notation in IPv6 , for e.g. suppose we have an address
2405:0201:401d:9080:abcd:1234:0000:8b6e, here the first half would be the subnet i.e. 2405:0201:401d:9080 while the remaining part would be the interface id.
In the context of IPv6 addresses, CIDR notation refers to the representation of subnets and their associated network prefix lengths. Subnets are denoted in CIDR notation by specifying the network prefix length along with the IPv6 address. For example, an IPv6 address like 2405:0201:401d:9080:abcd:1234:0000:8b6e might be expressed in CIDR notation as 2405:0201:401d:9080::/64, where :: signifies the compressed consecutive groups of zeros, and /64 indicate the length of the network prefix. The remaining part of the address, such as abcd:1234:0000:8b6e, represents the interface ID.
IPv6 addresses, CIDR notation refers to the representation of subnets and their associated network prefix length . Subnet are denoted in CIDR notation in IPv6 fe80::77df:4b70:93a:53bb where the first half would be subnet and remaining part is interface ID.