McDATA Sphereon 4500 Manuel d'utilisateur télécharger pdf (Page 91)

Performance View

2-35

Monitoring and Managing the Switch

• Frames too short

A received frame exceeded the Fibre Channel frame maximum

size or was less than the Fibre Channel minimum size, indicating

the frame arrived at the switch’s port corrupted. Frame

corruption may be caused by device disconnection, an optical

transceiver failure at the device, a bad fiber-optic cable, or a poor

cable connection.

Troubleshooting Tips

As a general rule, you should clear all counts after the system is

stabilized. When looking at the Performance View, roughly keep

track of the time interval when errors accumulate to judge the

presence and severity of a problem. Also, recognize that there is a

link recovery hierarchy implemented in Fibre Channel to handle

some level of “expected anomalies.” In general, only be

concerned with error counts that increment very quickly.

Button Functions

The two buttons located at the right end of the title bar on the

Statistics Values table are:

• Clear

The Clear button clears all counters to zero. Selecting this button

displays a Clear Port Statistics dialog box. Select the appropriate

radio button and click OK to clear all counters to zero on the

selected port only or counters on all ports on the switch. Note that

this also clears counters for other Product Manager users.

An entry identifying when the statistics were cleared and by

whom is saved in the Audit Log.

• Refresh

The Refresh button updates the data in the statistics tables and

enables you to compare values at any given time. Note that you

can also refresh data by clicking the port’s bar graph.

Click Clear to clear the statistics counters to zero. When the

confirmation dialog box displays, select This port only or All ports

on product, then click OK to clear the counters to 0.

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McDATA Sphereon 4500 Manuel d'utilisateur Page 91