Qlogic 3000 Series, Reference Manual

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2–Fabric Discovery Classes
QLGC_FCPort : CIM_FCPort
59223-03 E 2-9
IOStreamGuardState
(Local Only)
Property will contain an enumerated value representing the operational
state of the port IOStreamGuard feature. The property is used to detect
what state the port is using when the FCPortSettings.IOStreamGuard
property has been set to 1-AutoDetect.
Supported values are:

2 - Enable: Suppresses the reception of RSCN messages from
other ports for which I/O Stream Guard is enabled.

3 - Disable: Allows free transmission and reception of RSCN
messages.
PerformanceTuningMode
(Local Only) Property will contain an enumerated value representing
the operational tuning mode in use by the port, if any. The property is
used to detect what mode the port is using when the
FCPortSettings.PerformanceTuningMode property has been set to
1-AutoDetect.
Supported values are:

2 - None

3 – MFS: Multi-frame sequence interleaving is suppressed.

4 – VI: Enable support for VI frames.

5 – LCF: Preference routing for link control frames.

6 – VI-LCF: Both VI and LCF are enabled BBCredits
BBCredits
(Local Only) Property represents the number of (buffer to buffer)
credits dedicated to the port.