HP StorageWorks Fabric OS 5.x Fabric Watch Administrator Guide (AA-RVJ0B-TE, September 2005)

16 Fabric Watch concepts
• HP StorageWorks SAN Switch 2/8V, 2/16V and 2/16N
• HP StorageWorks SAN Switch 2/32
• HP StorageWorks SAN Switch 4/32
Performance monitor class areas
Table 6 lists Fabric Watch areas in the Performance Monitor class and describes each area.
Port class areas
Table 7 lists and describes the Fabric Watch areas in the port class.
Table 6 Performance monitor class areas
Area Indicates
Customer Define Relies on performance monitor telnet commands. For more information
on this area, refer to the
HP StorageWorks Fabric OS 5.x command
reference guide
.
Invalid CRC Errors have been detected in the Fibre Channel frame. Invalid CRC
messages occur when the number of CRC errors in Fibre Channel
frames for specific source ID (S_ID) and destination ID (D_ID) pairs
change. These messages can also be caused by dirty or aging
equipment and temperature fluctuations.
Receive Performance The percentage of word frames traveling from the configured S_ID to the
D_ID exceeds the configured thresholds.
Transmit Performance The percentage of word frames traveling from the configured S_ID to the
D_ID; user configuration triggers these messages, so you can use the
Transmit Performance area to tune your network.
Table 7 Port class areas
Area Indicates
Invalid Cyclic
Redundancy Checks
(CRCs)
A frame is invalid and cannot be transmitted. Invalid CRCs can
represent noise on the network. Such frames are recoverable by
retransmission. Invalid CRCs indicate a potential hardware
problem. These errors occur mostly in aging fabrics.
Invalid Transmission
Word
A word did not transmit successfully. Invalid word messages usually
indicate a hardware problem.
Link Failure Count A link loses signal. Both physical and hardware problems can
cause link failures. Link failures frequently occur due to a loss of
synchronization. Check for concurrent loss of synchronization errors
and, if applicable, troubleshoot those errors. Link failures also occur
due to hardware failures.
Loss of Signal Count The number of times that a signal loss occurs in a port. Signal loss
indicates that no data is moving through the port. A loss of signal
usually indicates a hardware problem.
Loss of Synchronization
(Sync) Count
Two devices failed to communicate at the same speed.
Synchronization losses are always accompanied by link failure.
Loss of synchronization errors frequently occur due to a faulty SFP
or cable.
Primitive Sequence
Protocol Error
A CRC sum disparity. Occasionally, these errors occur due to
software glitches. Persistent errors occur due to hardware problems.