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IPv6 addresses are assigned to organizations in much larger blocks as compared to IPv4 address assignments—the recommended allocation is a / 48 block which contains 2 80 addresses, being 2 48 or about 2.8 × 10 14 times larger than the entire IPv4 address space of 2 32 addresses and about 7.2 × 10 16 times larger than the / 8 blocks of IPv4 ...
Special address blocks Address block Address range ... The global Internet IPv4/IPv6 translation ... Addresses used in documentation and example source code ...
Addresses can also be entered in a single argument. {{blockcalc|Any text that includes IPv4 and/or IPv6 addresses.}} Addresses are extracted from the arguments, so any text can be used. {{blockcalc|1=Any text with = that includes IPv4 and/or IPv6 addresses.}} Use 1= if the text contains "=". The following optional parameters can be used. |ok
IPv6 multicast: [41] The low 32 bits an Ethernet address for IPv6 multicast traffic are the low 32 bits of the multicast IPv6 address used. [40]: §2.3.1 For example, IPv6 multicast traffic using the address ff02::d uses the MAC address 33-33-00-00-00-0D, and traffic to ff05::1:3 goes to the MAC address 33-33-00-01-00-03. 01-0C-CD IEC
The solicited-node multicast addresses are generated from the host's IPv6 unicast or anycast address, and each interface must have a solicited-node multicast address associated with it. A solicited-node address is created by taking the least-significant 24 bits of a unicast or anycast address and appending them to the prefix ff02::1:ff00:0 / ...
The Internet Engineering Task Force (IETF) has reserved the IPv4 address block 169.254.0.0 / 16 (169.254.0.0 – 169.254.255.255) for link-local addressing. [1] The entire range may be used for this purpose, except for the first 256 and last 256 addresses (169.254.0.0 / 24 and 169.254.255.0 / 24), which are reserved for future use and must not be selected by a host using this dynamic ...
The address block fc00:: / 7 is reserved by IANA for unique local addresses (ULAs). [2] They are unicast addresses, but contain a 40-bit random number in the routing prefix to prevent collisions when two private networks are interconnected. Despite being inherently local in usage, the IPv6 address scope of unique local addresses is global.
SSM destination addresses must be in the ranges 232.0.0.0/8 for IPv4. For IPv6 current allowed SSM destination addresses are specified by ff3x::/96, where the hexadecimal digit x represents the scope. [1] Note however that the allocation may be extended in the future so receivers and network equipment should treat any ff3x::/32 address as SSM. [2]