HP StorageWorks Fabric OS 6.x administrator guide (5697-7344, March 2008)

Fabric OS 6.x administrator guide 347
Monitoring AL_PAs
You can use the perfShowAlpaCrc command to display the CRC error count for all AL_PA devices or
for a single AL_PA on a specific active L_Port.
The following example displays the CRC error count for all AL_PA devices on a port:
switch:admin> perfshowalpacrc 1/1
AL_PA CRC count
--------------------
0xd9 0
The following example displays the CRC error count for a single AL_PA device on a port:
switch:admin> perfshowalpacrc 1/1, 0xd9
The CRC count at ALPA 0xd9 on port 1 is 0x000000000.
The following example clears the CRC error count:
switch:admin> perfclearalpacrc 1/1, 0xd9
CRC error count at AL_PA 0xd9 on port 1 is cleared.
switch:admin> perfclearalpacrc 1/1
No AL_PA value is specified. This will clear all AL_PA CRC
counts on port 1. Do you want to continue? (yes, y, no, n): [no] y
Please wait ...
All alpa CRC counts are cleared on port 1.
In 3.1.0, 4.1.0, and later versions, you can use the portStatsClear command to clear AL_PA- based
CRC error counters for all the ports in the same group.
Monitoring end-to-end performance
End-to-end performance monitoring counts the number of words and CRC errors in Fibre Channel frames
for a specified Source ID (SID) and Destination ID (DID) pair. An end-to-end performance monitor includes
these counts:
• RX_COUNT (words in frames received at the port)
• TX_COUNT (words in frames transmitted from the port)
• CRC_COUNT (frames with CRC errors received at or transmitted from the port)
To enable end-to-end performance monitoring, you must configure an end-to-end monitor on a port,
specifying the SID-DID pair (in hexadecimal). The monitor counts only those frames with matching SID and
DID.
Each SID or DID has the following three fields.
• Domain ID (DD)
• Area ID (AA)
• AL_PA (PP)
For example, the SID 0x118a0f denotes DD 0x11, AA 0x8a, and AL_PA 0x0f.
You can monitor end-to-end performance using the perfMonitorShow command, as described in
”Displaying monitor counters” on page 357. You can clear end-to-end counters using the
perfMonitorClear command, as described in ”Clearing monitor counters” on page 361.