HP StorageWorks MSA 2/8 HP StorageWorks MIB V3.1.x/4.1.x Reference Guide (AA-R - Page 290

Fibre Alliance MIB Objects 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 are all distinct connUnits, so the host and agent cannot use the WWN of the HBA. 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 connUnitId. But if the Ethernet is a replaceable PCCard, the hub should have an independent ID. Note: HP's implementation maps the switch WWN to the top 8 octets of this variable and sets the remaining lower 8 octets to 0. Example: If the HP switch WWN is 10:0:0:60:69:10:02:18, then SNMP GET on connUnitGlobalId.10.0.0.60.69.10.02.18.0.0.0.0.0.0.0.0 returns: 10 00 00 60 69 10 02 18 00 00 00 00 00 00 00 00 connUnitType OID Description 1.3.6.1.3.94.1.6.1.3 The type of this connectivity unit. Note: Set to 4 (switch). connUnitNumports OID Description 1.3.6.1.3.94.1.6.1.4 Number of physical ports (between 0 and the maximum number of system supported ports) in the connectivity unit (internal/embedded, external). 290 MIB Version 3.1.x/4.1.x Reference Guide