Check Switch Components; Cursory Debugging Of Media Components - HP StorageWorks MSA 2/8 - SAN Switch User Manual

Check Switch Components

The following sections describe how to troubleshoot the switch components.

Cursory Debugging of Media Components

The following procedure describes basic steps that can help to narrow down faulty
media.
1. Log into the switch as admin.
2. Enter switchshow at the command line.
3. (Optional) Enter version at the command line.
4. Enter portErrShow at the command line.
5. Glance over the port statistics.
6. (Optional) Run tests if you still suspect a media problem.
Fabric OS Procedures Version 3.1.x/4.1.x User Guide
Look for a known good portstate online or insync.
The version can be used to check the known buglist in the appropriate Release
Notes.
A error summary of all ports is displayed.
— Most numbers should be small. An excessively large number (such as one
over 100,000) could indicate a bad transceiver.
— Also check for rapidly rising error counts.
Tip: The LLI_errs (Low Level Interrupt_errors) are the sum of the port's eight
statistical error counters: ENC_in, CRC_err, TruncFrm, FrmTooLong,
BadEOF, Enc_out, BadOrdSet, and DiscC3. Check portErrShow output
to determine what generated the LLI_errs.
— To test components to and from a neighbor switch, see
Switch ISL Links"
— To test a port's external transmit and receive path, see
External Transmit and Receive Path"
— To test the internal components of a suspect switch, see
Internal Components"
— To test the components between a switch and a hub (and back), see
Components To and From the HBA"
on page 220.
on page 225.
on page 222.
on page 222.
Troubleshooting
"Test Cascaded
"Check Port's
"Test a Switches
"Test
219