HP StorageWorks 8B - FC Entry Switch Reference Manual page 98

2
Fibre Alliance MIB Object Types
•
It SHOULD be one of these FC-PH/PH3 formats:
•
•
•
•
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 the connUnit via other management methods, one of
them SHOULD be used for connUnitGlobalId.
If there is not a WWN assigned specifically to the connUnit, 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 are all distinct connUnits, 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 connUnitId. But if the Ethernet were a replaceable
PCCard, the hub should have an independent ID.
Note:
connUnitType [connUnitTable]
Syntax
FcUnitType
Access
Read-only
Status Mandatory
Description The type of this connectivity unit.
Note:
2-12
IEEE (NAA=1)
IEEE Extended (NAA=2)
IEEE Registered (NAA=5).
IEEE Registered extended (NAA=6).
The FC Entry Switch 8B, FC Switch 8B, and FC 16B map the switch WWN to the top 8
bytes of this variable and sets the remaining lower 8 bytes to 0. For example, if the switch
WWN is 10:00:00:60:69:10:02:18, then SNMP-GET
connUnitGlobalId.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.1 returns
10 00 00 60 69 10 02 18 00 00 00 00 00 00 00 00
Set to 4 (switch).
MIB Reference Manual Version 3.0