Group Destination Address are broadcast address in class D domain. Multicast IP address are Class D IP address, from 224.0.0.0 to 239.255.255.255. They are also referred to as Group Destination Address (GDA). There is a mapping between IP address and MAC address for GDA. GDA MAC address is formed by 01:00:5E:XX:XX:XX, followed by the latest 24 bits of the GDA multicast IP address in hex.
Example: 220.15.15.15 --> Ethernet MAC of 01:00:5E:0F:0F:0F
For IPv6 Multicast addresses, the Ethernet MAC is derived by the four low-order octets OR'ed with the MAC 33:33:00:00:00:00.
Example: the IPv6 address FF02:DEAD:BEEF::1:3 --> Ethernet MAC of 33:33:00:01:00:03 (RFC 2464).
Famous quotes containing the words group, destination and/or address:
“around our group I could hear the wilderness listen.”
—William Stafford (1914–1941)
“A man’s destination is his own village,
His own cooking fire, and his wife’s cooking;
To sit in front of his own door at sunset
And see his grandson, and his neighbour’s grandson
Playing in the dust together.”
—T.S. (Thomas Stearns)
“Patience, to hear frivolous, impertinent, and unreasonable applications: with address enough to refuse, without offending; or, by your manner of granting, to double the obligation: dexterity enough to conceal a truth, without telling a lie: sagacity enough to read other people’s countenances: and serenity enough not to let them discover anything by yours; a seeming frankness, with a real reserve. These are the rudiments of a politician; the world must be your grammar.”
—Philip Dormer Stanhope, 4th Earl Chesterfield (1694–1773)