CONVERT MAC ADDRESS INTO IP ADDRESS 64 BITS

Thus from 224 - 239 has two addresses in each group, just 32 th. When the third digit is less than 128, add 128 Just the third greater than 128 when, to minus 128 Other 31 available multicast IP addresses:Ĭalculate the remaining available multicast IP methods: When it is 1, it should be removed and replaced with 0.ĭivide 16 : 215/16 quotient : more than 13 : 7. The 8th bit of the third group must be 0. Do not look at the 8th group of the 4th group, because it is specified to start with 0100. 5 -bit variable, two of the 4 th is 16 ), get out of the business into 16 hex is MAC 's left position, get out of the remainder into 16 hex is the MAC right place. 3 bits is greater than 128, may be 128 divided by 16 (because the available IP are 28 bits available MAC is 23 is bit left. So when not 0, the change to 0 to conversion.Ĭonverted to binary 11100000. Then the binary into 16 hex, the first 1 Ge 8 bits (from left to right ) do not, because there are multicast MAC limit has been specified is 0100. The dumbest method, and the safest method, is to replace the IP address with a binary number. At that time, because his OUI was ( 0100.5E 0 ), these 7 remained unchanged. Require a total of: 16 Ge OUI can only be one IP to-one correspondence.Īllusion: It was researched by Dr.Steve Deering. MAC of 48bit composed of : before 24 bits are the OUI, the 24 bits define by the manufacturer

In Apple Talk, MAC allocation is managed by the DDA protocol (Dynamic Address ProtocolĬonversion method and example between multicast IP address and multicast MAC address Reserve all addresses with '1' bits for broadcasting.

Do not share the same address between two workstations.Ģ. In Ethernet, if you need to modify the mac address, please pay attention:ġ. Users usually do not need to modify the address. It can be seen that among the above 48-bit MAC addresses, the last 24 bits can be modified by the user. The 24-bit user address can be configured and modified by the user, but make sure that the address you modify cannot be the same as others. Every manufacturer in the world that produces network interface equipment must Obtain a 22-bit address designated by IEEE, and the address must not be the same as another manufacturer. TheĢ2-bit legal address is usually allocated by IEEE to network equipment manufacturers. The U/L bit determines whether the address is allocated locally (1) or uniformly (0). In the case of a group address, if all address bits are 1, then the I/G bit indicates that this is a broadcast address. The video (above) walks you step-by-step through this process, and also shows you how the calculated EUI-64 address can be used to calculate a router interface’s Link Local address (an IPv6 address used for communication only on the local network segment).I/G bit determines whether the address is a personal address (0) or a group address (1). Step #6: Convert these first eight bits back into hex:Ġ0000010 -> 02, which yields an EUI-64 address of 0215:2BFF:FEE4:9B60

Step #4: Convert the first eight bits to binary: Step #3: Change the format to use a colon delimiter: Step #1: Split the MAC address in the middle: The objective is to calculate the corresponding EUI-64 address based on this MAC address. SCENARIO: Router R1 has a MAC address of 0015.2BE4.9B60 on its Fa 0/0 interface. The following steps walk you through a sample EUI-64 calculation: This command tells the interface to use 2000:1:: as the network portion of the IPv6 address and to automatically calculate the 64-bit host portion of the IPv6 address.ĮUI-64 uses an interface’s MAC address as the basis of it’s calculation, even though we need a 64-bit host address, and a MAC address is only 48 bits in length. You could (in interface configuration mode of your Cisco IOS router) enter the command: For example, let’s say you have a router interface on the IPv6 network of 2000:1::/64. While you could manually configure the host bits for a router interface, a more efficient approach might be to automatically calculate those host bits using a 64-bit Extended Unique Identifier, known as EUI-64.

CONVERT MAC ADDRESS INTO IP ADDRESS 64 BITS

A common approach is to use 64 bits to represent the network segment and 64 bits to represent the host on that network segment. An IPv6 address is 128 bits in length, and like an IPv4 address, it’s divided into prefix bits (representing the network segment) and host bits (uniquely identifying a host on that network segment).

Convert mac address into ip address