HP StorageWorks 64 FW 07.00.00/HAFM SW 08.06.00 McDATA E/OS SNMP Support Manua - Page 176

Fibre Alliance MIB A Sequence IEEE Extended (NAA=2) IEEE Registered (NAA=5). IEEE Registered extended (NAA=6). Use of the IEEE formats allows any IEEE-registered vendor to assure global uniqueness independently. The following are some references on IEEE WWN formats: http://standards.ieee.org/regauth/oui/tutorials/fibreformat.html http://standards.ieee.org/regauth/oui/tutorials/fibrecomp_id.htm l If one or more WWNs are associated with the connectivity unit via other management methods, one of them SHOULD be used for fcConnUnitGlobalId. If there is not a WWN assigned specifically to the connectivity unit, there is some merit, though not a requirement, to using a WWN assigned to (one of) its permanently attached FC/LAN interface(s). This can not risk uniqueness, though. As a counterexample, if your agent runs in a host and the host has an HBA, it is quite possible that agent, host, and HBA will all be distinct connectivity units, so the host and agent can not use the WWN of the HBA. Another example: If your hub has a built-in Ethernet port, it might be reasonable for the hub to use its LAN address (prefixed with the appropriate NAA) as its fcConnUnitId. But if the Ethernet were a replaceable PCCard, the hub should have an independent ID. ::= { fcConnUnitEntry 2 } fcConnUnitType Syntax Max-Access Status Description Sequence FcUnitType read-only current The type of this connectivity unit. ::= { fcConnUnitEntry 3 } fcConnUnitNumPorts Syntax Unsigned32 A-10 E/OS SNMP Support Manual