HP StorageWorks 2.12 Edge Switch - Manual (Page 87)

Monitoring and Managing the Switch
87 Edge Switch Element Manager User Guide
■ Discarded Frames—The number of Class 3 frames discarded, including
multicast frames with bad destination identifiers (D_IDs).
The switch increments this count when it discards a frame that cannot be
routed. This occurs most frequently when a destination becomes unavailable
without the source realizing that the destination is unavailable. There are no
thresholds for this value. Typically, this occurs when the destination is not
available due to the destination device’s action.
■ Four Byte Words Rx—The number of four-byte words received.
■ Four Byte Words Tx—The number of four-byte words transmitted.
Error Statistics
Port errors indicate that a port is not operating correctly. Use this data to isolate
problems with port and link operations. The statistics in this table include:
■ Link failures—A link failure was recorded in response to a not operational
sequence (NOS), protocol timeout, or port failure. At the Hardware View, a
yellow triangle displays to indicate a link incident, or a blinking red and
yellow diamond displays to indicate a port failure.
■ Sync losses—A loss of synchronization was detected because the attached
device was reset or disconnected from the port. At the Hardware View, a
yellow triangle displays to indicate a link incident.
■ Signal losses—A loss of signal was detected because the attached device was
reset or disconnected from the port. At the Hardware View, a yellow triangle
displays to indicate a link incident.
■ Primitive sequence errors—An incorrect primitive sequence was received
from the attached device, indicating a Fibre Channel link-level protocol
violation. At the Hardware View, a yellow triangle displays to indicate a link
incident.
■ Discarded frames—A received frame could not be routed and was discarded
because the frame timed out (insufficient buffer-to-buffer credit) or the
destination device was not logged into the switch.
■ Invalid transmission words—The number of times that the switch detected
invalid transmission words from the attached device. This indicates that a
frame or primitive sequence arrived at the switch’s port corrupted. This
corruption can be due to the attached device performing a reset, plugging or
unplugging the link, bad optics at either end of the cable, a bad cable, or a
dirty or poor connection. Moving the connection around or replacing cables
can isolate the problem.