Auto Performance Tuning And Al Fairness; Resetting A Port; Testing Ports; Advanced Port Properties Dialog Box - HP StorageWorks 8/20q User Manual

Auto Performance Tuning and AL Fairness

The Auto Perf Tuning and AL Fairness settings are configured using the Advanced Port Properties dialog
box (Figure 52). The Auto Perf Tuning option enables the switch to dynamically control the MFS_Enable,
VI_Enable and LCF_Enable features based on the operational state of the port. The AL Fairness option
controls how frequently the switch can arbitrate for access. Applies only to ports running in loop (FL) mode.
To open the Advanced Port Properties dialog box, select one or more ports, open the Port menu, and then
select Advanced Port Properties.
Figure 52

Advanced Port Properties dialog box

Resetting a port

The Reset Port option reinitializes the port using the saved configuration. To reset a port:
1. In the faceplate display, select the port(s) to be reset.
2. Select Port > Reset Port.
3. Click Yes to reset the selected port(s).

Testing ports

You can test a port using the Port Diagnostics dialog box. Only one port can be tested at a time for each
type of test. The Port Diagnostics dialog box
• Internal is a disruptive test that verifies port circuitry. The SerDes level test sends a test frame from the
ASIC through the SerDes chip and back to the ASIC for the selected ports. The port passes the test if the
frame that was sent by the ASIC matches the test frame that was received. This test requires that the port
be in diagnostics mode, and therefore disrupts communication.
• External is a disruptive test that verifies port circuitry. The SFP level test sends a test frame from the ASIC
through the SerDes chip, through the SFP transceiver fitted with an external loopback plug, and back to
the ASIC for the selected ports. The port passes the test if the test frame that was sent by the ASIC
matches the test frame that was received. This test requires that the port be in diagnostics mode.
• Online is a non-disruptive test that verifies communications between the port and its device node or
device loop. The port being tested must be online and connected to a remote device, and therefore,
does not disrupt communication. The port passes the test if the frame that was sent by the ASIC matches
the frame that was received.
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(Figure 53) presents the following tests: