HP StorageWorks 2.140 Director Switch - Manual (Page 106)

Monitoring and managing the Director
104 Director Element Manager User Guide
■ Delimiter errors—The number of times that the director detected an
unrecognized start-of-frame (SOF), an unrecognized end-of-frame (EOF)
delimiter, or an invalid class of service. This indicates that the frame arrived at
the director’s port corrupted. This corruption can be due to
plugging/unplugging the link, bad optics at either end of the cable, bad cable,
or dirty or poor connections. Moving the connection around or replacing
cables can isolate the problem.
■ Address ID errors—A received frame had an unavailable or invalid Fibre
Channel destination address, or an invalid Fibre Channel source address. This
typically indicates the destination device is unavailable.
■ Frames too short—A received frame exceeded the Fibre Channel frame
maximum size or was less than the Fibre Channel minimum size, indicating
the frame arrived at the director’s port corrupted. Frame corruption may be
caused by device disconnection, an optical transceiver failure at the device, a
bad fiber-optic cable, or a poor cable connection.
Operational Statistics
The following describes the Operational Statistics that display for a selected port
■ Offline sequences Rx—The number of offline sequence that the port has
received.
■ Offline sequences Tx—The number of offline sequence that the port has
transmitted.
■ Link resets—The number of link reset protocol frames received/transmitted
by this port from/to the attached device. The director transmits a link reset to
initiate the link reset protocol or recover from a link timeout. This occurs
normally to establish BB_Credit or on any port in order to recover lost
BB_Credit. The director receives a link reset from an attached device if the
device wishes to initiate the link reset or recover from a link timeout.