The World Wide Name (WWN) is the 64-bit address given to a single element in a specific Fibre Channel Network. This distinguishes an element of the network from one another.

How does WWN operate?

The WWN is an 8-byte number. The first 3 bytes are from the 24-bit OUI (Organizationally Unique Identifier) number purchased from the IEEE (Institute of Electrical and Electronics Engineers). The vendor supplies the remaining bytes of information to complete the WWN.

WWN’s Formats

  1. The Original Format – addresses allocated to the IEEE standards that the committee set up and made into a device built in a given time –this is parallel to the Ethernet Mac address. The first 2 bytes are the vendor identifier that has 3 bytes and the next 3 bytes is a serial number specified by the vendor.
  2. New Addressing Schema – is the first-ever half byte followed by the vendor identifier’s 3-byte and the 4-byte and half for the serial number, which the vendor specifies.

What is a Fibre Channel?

It is gigabit-speed network technology mainly used for storage networking. The T11 Technical Committee of the IICITS, an ANSI-accredited standards committee regulates the Fibre Channels. The Fibre Channels are those that use the WWN to cite the different elements in their given Channel Network.

What is Soft Zoning?

Soft Zoning is the process used by switches on Fibre Channels to prevent ports from being seen outside their own zones. There is, however, a security risk attached in soft zoning. The ports can become accessible if a user in a different zone correctly gets the fibre channel address. Although very risky, the WWN still assigns soft zoning to maintain its processes.

What is WWN Zoning?

WWN zoning is the usage of name services in switches to either allow or stop access to a given World Wide Names in its framework. One major advantage of zoning is its ability to re-cable the structure without repeating the process of creating the zone information.