HP StorageWorks XPath OS 7.4.X MIB Reference Guide (AA-RVHEC-TE, September 2005)

24 FibreAlliance MIB objects
connUnitGlobalId
OID 1.3.6.1.3.94.1.6.1.2
Description An optional global-scope identifier for this connectivity unit. It must be a WWN or 16
octets of value 0.
The following characteristics are required:
• WWN formats requiring fewer than 16 octets must be extended to 16 octets using
trailing 0s.
• If a WWN is used for connUnitId, the same WWN must be used for
connUnitGlobalId.
When a nonzero value is provided, HP strongly recommends the following
characteristics:
• It should be persistent across agent and unit resets.
• It should be globally unique.
• It should be one of the following FC-PH/PH3 formats:
• IEEE (NAA=1)
• 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.html
If one or more WWNs are associated with connUnit through other management
methods, one of them should be used for connUnitGlobalId.
If a WWN is not assigned specifically to connUnit, there is some merit, although no
requirement, to using a WWN assigned to (one of) its permanently attached FC/LAN
interfaces, without endangering uniqueness.
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 and so the host and agent
cannot use the WWN of the HBA.
Example If your hub has a built-in Ethernet port, the hub could use its LAN address (prefixed with
the appropriate NAA) as its connUnitId. However, if the Ethernet is a replaceable
PCCard, the hub should have an independent ID.
Note The HP implementation maps the switch WWN to the top eight octets of this variable and
sets the remaining lower eight octets to 0.
For 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 and returns 10 00 00 60
69 10 02 18 00 00 00 00 00 00 00 00
connUnitType
OID 1.3.6.1.3.94.1.6.1.3
Description The type of this connectivity unit.
Note This is set to switch (4).
connUnitNumports
OID 1.3.6.1.3.94.1.6.1.4
Description Number of physical ports (between 0 and the maximum number of system-supported
ports) in the connectivity unit (internal/embedded, external).