Fabric Manager Users Guide, Version 6.1, Revision A - QLogic

2–Advanced Fabric Manager Capabilities
Performance Manager
When this capability is enabled, the Fabric Manager will look for links which are
running at SDR speeds but have LinkSpeedSupported values which include DDR
and/or QDR on both sides of the link. In which case, the Fabric Manager will
adjust the LinkSpeedEnabled to be DDR or QDR (respectively) and bounce the
link to have it run at the new speed. This works hand -in-hand with the QLogic
OFED+ s20tune tool, which upon noticing a link which is Down for more than 10
seconds and has only DDR or QDR enabled, will restore the LinkSpeedEnabled
on the Host Channel Adapter to match LinkSpeedSupported. This will permit the
negotiation process to start over.
NOTE:
QLogic recommends using IBTA compliant switch and Host Channel
Adapter firmware. The Firmware is available for all QDR switches, check
with your switch vendor to obtain the firmware. All QLogic QDR switches are
IBTA compliant. Many DDR switches are not IBTA compliant, however
QLogic Switches with level 5.0.4 or later firmware can inter-operate with
legacy DDR devices without the need for these FM options.
Performance Manager
The Performance Manager (PM) is the Fabric Management entity responsible for
monitoring fabric information related to the port level counters and the picture that
they convey. Each port in the fabric monitors counters that tally information such
as the amount of data transmitted and received, as well as occurrences of errors
that indicate problems at the port and link level. Refer to Figure 2-9 for an
example of the management paths.
IB0054608-01 B 2-23