convert mac address to 64 bit host address

Both of these EUI-64 numbers will down convert to EUI-48 fc:c2:3d:12:34:56, a 2-to-1 mapping in this case. At least thats the answer with Atmel AT24MAC chips. # eliminate all delimiters, note that only ':' is not enough the standard is '-', but '. Their answer is NO, shortening a EUI-64 down to a EUI-48 when the middle bytes are something other than 0xffff or 0xfffe can cause a collision. Here's an example of what it would look like to treat those addresses as numbers and/or objects: require 'ipaddr' MAC addresses can be either 48 or 64 bits, and so for each 48-bit format.

Ruby actually comes with a library for manipulating IP addresses as part of its standard library. Parsing of all host name and ipv4/ipv6 address formats in common usage plus.

You should at least treat IP addresses or EUIs as numbers, not as text, but really, you should treat them as rich, structured IP address objects or EUI objects. EUI-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. Now, of course, Strings are also objects in Ruby, but they are objects which represent text, they are not objects which represent IP addresses or EUIs.

You create programs by manipulating rich, structured objects, more precisely by telling rich, structured objects to manipulate themselves. Here is your main problem: Ruby is an object-oriented language.

Convert mac address to 64 bit host address