World Wide Name
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A World Wide Name (WWN) or World Wide Identifier (WWID) is a unique identifier in a Fibre Channel storage network. Each WWN is an 8-byte number derived from an IEEE OUI (for the first 3 bytes) and vendor-supplied information (for the rest).
There are two formats of WWN defined by the IEEE:
- Original format: addresses are assigned to manufacturers by the IEEE standards committee, and are built into the device at build time, similar to Ethernet MAC address. First 2 bytes are either hex 10:00 or 2x:xx (where the x's are vendor-specified) followed by the 3-byte vendor identifier and 3 bytes for a vendor-specified serial number
- New addressing schema: first half-byte is either hex 5 or 6 followed by a 3-byte vendor identifier and 4 bytes and a half for a vendor-specified serial number
Contents |
[edit] Port Address
- Domain ID: 1 Byte, represents the unique identifier of the switch itself. One byte allows 256 possible addresses, but because some of these are reserved only 239 addresses are actually available.
- Area
- Port
[edit] List of a few WWN company identifiers
- 00:50:76 IBM
- 00:60:69 Brocade Communications Systems
- 00:05:1E Brocade Communications Systems, formerly owned by Rhapsody Networks
- 00:60:DF Brocade Communications Systems, formally CNT Technologies Corporation
- 08:00:88 Brocade Communications Systems, formally McDATA Corporation
