Brocade Fabric OS MIB Reference v7.1.0 (53-1002750-01, March 2013)

206 Fabric OS MIB Reference
53-1002750-01
Connectivity unit group
9
connUnitGlobalId
1.3.6.1.3.94.1.6.1.2
Read only An optional global-scope identifier for this connectivity unit. It must be a
WWN for this connectivity unit or 16 octets of value 0.
The following characteristics are required.
• WWN formats requiring fewer than 16 octets must be extended to
16 octets with trailing 0 octets.
• If a WWN is used for connUnitId, the same WWN must be used for
connUnitGlobalId.
When a non-zero value is provided, the following characteristics are
strongly recommended.
• It should be persistent across agent and unit resets.
• It should be globally unique.
• It should be one of these 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/fi
breformat.html
http://standards.ieee.org/regauth/oui/tutorials/fi
brecomp_id.html
If one or more WWNs are associated with the connUnit through other
management methods, one of them should be used for
connUnitGlobalId.
If a WWN is not assigned specifically to the connUnit, there is some
merit to using a WWN assigned to (one of) its permanently attached
FC/LAN interfaces. This cannot 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 cannot use the WWN of the HBA.
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.
The Brocade implementation maps the switch WWN to the top 8 octets
of this variable and sets the remaining lower 8 octets to 0.
For example:
If Brocade’s switch WWN is 10:0:0:60:69:10:02:18, then use the SNMP
GET command 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
1.3.6.1.3.94.1.6.1.3
Read only The type of this connectivity unit.
Set to 4 for Fibre Channel switches or to 14 for Brocade Access Gateway.
TABLE 75
Object and OID Access Description