HP StorageWorks 2.64 Director Switch - Manual (Page 81)

Director Element Manager user guide 81
Class 2 statistics
The Class 2 statistics include:
• Received Frames—The number of Class 2 frames received by this F_Port from its attached
N_Port.
• Transmitted Frames—The number of Class 2 frames transmitted by this F_Port to its attached
N_Port.
• Busied Frames—The number of F_BSY frames generated by this F_Port against Class 2 frames.
This can occur if frames are received before the switch completes initialization or if the switch is
servicing so many requests that it can not process a new request. The port generates frames if
the switch is not ready to accept commands. This may indicate temporary congestion.
• Rejected Frames—The number of F_RJT frames generated by this F_Port against Class 2 frames.
These frames usually occur because of attached device errors. The device is expected to correct
the error based on the reject code, then retry its request. If the device is able to recover, there is
no cause for concern. If not, further troubleshooting may be necessary. There are no thresholds
for this value. Typically, this occurs because the destination is not available due to the 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.
Class 3 statistics
The Class 3 statistics include:
• Received Frames—The number of Class 3 frames received by this F_Port from its attached
N_Port.
• Transmitted Frames—The number of Class 3 frames transmitted by this F_Port to the attached
N_Port.
• Discarded Frames—The number of Class 3 frames discarded, including multicast frames with
bad destination identifiers (D_IDs).
The director 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 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. Error statistics include:
• Link failures—A link failure was recorded in response to a not operational sequence (NOS),
protocol timeout, or port failure. At the Port Card view, a yellow triangle displays to indicate a
link incident, or a blinking red and yellow diamond displays to indicate a port failure.