HP Storage EVA Capacity Upgrades - Manual (Page 33)

30-10022-01 loop switch user guide 33
The High-level link statistic page displays the following information:
Diagnostic Description
Open-CLS Rx The counter for the number of CLS received to OPNs sent. This occurs when the
target device refuses to accept an OPN. If the counter increases, attempts to send
data out the port will be affected and performance will begin to degrade. This can be a
sign of congestion or a slow device.
Open-CLS Tx The counter for the number of CLS transmitted to OPNs received. This occurs when
the port does not allow a remote device to send data to it, indicating the RX buffers are
full or the device is unavailable. Frames in the buffers are being held due to a
destination device not servicing frames. Frames then back up the TX queue for the
destination device until the switch does not allow the source device to send more
frames. This can be a sign of congestion on the destination port. A slow servicing
device may need tuning of the data I/O request size.
ABTS Rx The number of ABORT sequences received on the port. ABTSs are responses to the
error condition when a frame or sequence of frames are lost or out of order.
Figure 16 Advanced Statistics High-level Link page