Fibre Channel Addressing and Routing World-Wide Names
Company IDs
All vendors wishing to create WWNs must register for a company ID or OUI (Organisationally Unique Identifier). These are maintained and published by IEEE, the current list can be found here.
All company identifiers are six digits in length and used within the WWN. In our examples, 00-60-48 is the code for EMC, 00-00-C9 is the code for Emulex and 00-E0-8B is the code for Qlogic.
Decoding Registered Name WWNs
The following Visual Basic program can be used to decode and encode WWPNs for EMC and HDS disk subsystems. I can’t guarantee that this code is 100% accurate, so if anyone has any comments or finds and bugs, let me know. Likewise if anyone has WWNs with serial numbers for disk subsystems from other manufacturers, let me know and I will add them in.
This is a brief introduction to WWNs but should help in validating that the correct device has been plugged into a SAN. One thing we have not mentioned is where to locate the WWN for an HBA. These are usually printed on the card itself, or can be obtained from the host. You should check with the HBA vendor on how to obtain this information. FYI