Fibre Channel Addressing and Routing World-Wide Names
The specific format of a WWN is defined by the Name Address Authority field value, which is the first digit of the WWN. The following values are used: 1 – IEEE 803.2 standard 48 bit ID 2 – IEEE 803.2 extended 48-bit ID 5 – IEEE Registered Name 6 – IEEE Extended Registered Name Most commonly seen are options 1, 2 and 5. We will not discuss format 6.
IEEE Standard (NAA=1)
This format is divided into 3 sections. We will use the previous Emulex example above to illustrate this format.
Section 1 identifies the WWN as a standard format WWN. Only one of the 4 digits is used, the other three must be zero filled. Section 2 is called the OUI or “company_id” and identifies the vendor (more on this later). Part 3 is a unique identifier created by the vendor.