Port-Class Areas - HP StorageWorks MSA 2/8 - SAN Switch User Manual

Using Fabric Watch
Table 5: Port-Class Areas
link loss
synchronization
(sync) loss
signal loss
protocol error
invalid words
invalid cyclic
redundancy checks
(CRCs)
receive (RX)
performance
transmit (TX)
performance
state changes
34
Area
Link loss errors occur when a link experiences a loss of signal
and fails. Both physical and hardware problems can cause
link loss errors. Link loss errors frequently occur due to a loss
of synchronization. Check for concurrent Loss of
Synchronization errors and, if applicable, troubleshoot that
error. Link losses also occur due to hardware failures.
Synchronization loss occurs when two devices fail to
communicate at the same speed. Sync-loss always
accompanies link loss. Loss of synchronization errors
frequently occur due to a faulty SFP or cable.
Signal loss indicates that no data is moving through the port.
A loss of signal usually indicates a hardware problem.
Protocol errors indicate a CRC sum disparity. Occasional
protocol errors occur due to software glitches. Persistent
protocol errors occur due to hardware problems.
Invalid words indicate a word that did not transmit
successfully. Invalid Words messages usually indicate a
hardware problem.
CRCs apply to the last 4 bytes of the frame. Invalid CRCs
indicate that a frame is not correct and cannot be
transmitted. Invalid CRCs may represent noise on the
network. Such frames are recoverable by retransmission.
Invalid CRCs indicate a potential hardware problem. These
errors occur most commonly in aging fabrics.
Measures the received optical power of the port in KB/s.
Measures the transmitted optical power of the port in KB/s.
Indicates that the state of the port has changed for one of the
following reasons:
The port has gone offline.
The port has come online.
The port is testing.
The port is faulty.
The port has become an E_Port.
The port has become an F_Port.
The port has segmented.
The port has become a trunk port.
Description
Fabric Watch Version 3.1.x/4.1.x User Guide