Cisco mac address oui for mac#
Cisco mac address oui registration#

One of the best places to start is probably the Wireshark codebase. And you can probably do a bit more with well-known multicast addresses but only by tracking down individudal vendor's documentation (IANA is obviously an important one but only definitive for 1 of the 2^22 available blocks). You can distinguish local addresses and multicast addresses, and make some attempt to tie up allocated unicast addresses to vendor blocks. The answer is that the IANA used to be run from an office in ISI: specifically IANA was the legendary Jon PostelД«ottom line: you are on a bit of a fool's errand. So, really the question should be 'how did the Internet get to use part of the range allocated to ISI?'. Now, how did the 01-00-5E range end up allocated to the Information Sciences Institute? The simpleДЄnswer is that they paid for it.

Cisco mac address oui registration#

From the IEEE registration point of view, there is no particular significance to these blocks (except possibly to those it has allocated to itself). A tiny fraction of multicast addresses have a significant meaning because heavyweights like IEEE, Cisco, IANA assign meanings to them. You can use any address that has the local bit set freely. There is a list of OUIs that have been allocated, unless the buyer has paid (a lot) extra for privacy. In the following example 11:22:33 is the OUI of the mac address and AA:BB:CC is the random address part. The remaining part of the MAC address is managed by the assigned manufacturer. In other words, it consists of 6 hexadecimal values. So, there isn't really a list of reserved addresses. The Organizational Unique Identifier consists of 24 bits of the MAC address. You would have to add the OUI to the 'HP-Device' profile. MAC addresses are formed according to the principles of two numbering spaces based on Extended Unique Identifiers (EUI) managed by the Institute of Electrical and Electronics Engineers (IEEE): EUI-48, which replaces the obsolete term MAC-48, 1 and EUI-64. You must first match the 'HP-Device' profile before being evaluated to match the 'HP-Printer' profile. The address typically includes a manufacturer's organizationally unique identifier (OUI). For instance, 00:80:C2 is allocated to the IEEE 802.1 committee, which uses 01:08:C2:00:00:00 for Spanning tree. The Cisco provided 'HP-Printer' profile is attached to a parent profile as indicated by 'Parent Policy: HP-Device'. You also get the rights to the corresponding multicasts, which have the prefix with the lowest bit of the first byte set.

It hands out OUIs (Organizationally Unique Identifiers), which give you a three byte prefix, and 2^24 addresses within it, for a fee (currently 2 995USD). Cisco develops, manufactures and sells networking hardware, software, telecommunications equipment and other high-technology services and products.

Cisco mac address oui for mac#

The registration authority for MAC addresses is the IEEE. is an American multinational technology conglomerate headquartered in San Jose, California, in the center of Silicon Valley.