HP StorageWorks MSA 2.8 SAN Switch - Manual (Page 227)

Troubleshooting
227 Fabric OS Procedures Version 3.1.x/4.1.x User Guide
Check all Switch Components of the Port Transmit and Receive Path
The following procedure exercises all the switch components from the main board
--> SFP --> fibre cable --> back to SFP --> back to main board.
1. Make sure all cables used for connected port and SFPs are of the same
technology (i.e., a short wavelength SFP switch port should be connected to
another short wavelength device SPF through a short wavelength cable).
2. Connect ports from different ASICs, if possible (for example, connect port 1
through port 7).
3. Log into the switch as admin.
4. Enter switchdisable if the switch should assume all ports are cable
loopbacked (and test accordingly).
or
Leave the switch enabled if only cable loopbacked ports should be tested (and
the rest ignored).
5. (Optional) Enter setsfpmode to limit the test to ports with that contain
SFPs.
This mode must be disabled when test is complete.
6. Enable the ports for cabled loopback mode by entering crossporttest
with the selected operands.
Refer to the HP StorageWorks Fabric OS Version 3.1.x/4.1.x Reference Guide
for details regarding the operands.
7. Create a frame F of maximum data size (2112 bytes).
8. Transmit frame F through port M.
9. Pick up the frame from its cross-connected port N. An error is reported if any
port other than N actually receives the frame.
10. Determine if any of the following statistic error counters are non-zero:
ENC_in, CRC_err, TruncFrm, FrmTooLong, BadEOF, Enc_out,
BadOrdSet, DiscC3.
11. Determine if the transmit, receive, or class 3 receiver counters are stuck at a
value.
12. Determine if the number of frames transmitted is not equal to the number of
frames received.
13. Determine if the number of frames transmitted is not equal to the number of
frames received.