OS SNMP Support Manual (620-000131-620, April 2005)

Connectivity unit group

B-9

FC Management MIB

The value assigned to a given conectivity unit SHOULD be persistent

across agent and unit resets. It SHOULD be the same as

connUnitGlobalId if connUnitGlobalId is known and stable.

Sequence

::= { connUnitEntry 1 }

connUnitGlobalId

Syntax FcGlobalId

Access read-only

Status mandatory

Description An optional global-scope identifier for this connectivity unit. It MUST

be a WWN for this connectivity unit or 16 octets of value zero. WWN

formats requiring fewer than 16 octets MUST be extended to 16 octets

with trailing zero octets, Left justified, zero filled, If a WWN is used

for connUnitId, the same WWN MUST be used forconnUnitGlobalId.

When a non-zero value is provided, 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/fibreformat.html

http://standards.ieee.org/regauth/oui/tutorials/fibrecomp_id.htm

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.