Specifications

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LICENSED MATERIAL - PROPERTY OF FUJITSU SOFTWARE TECHNOLOGY CORPORATION
41
RxOls Receipt of N_Port OLS. A received N_Port OLS indicates that a connected device
went into an Off-Line state—that is, although the device is
still powered on, it is not operational because the upper
level needs recovery time before data can be transmitted or
received. Frequent OLS states indicate that the devices
were able to establish connection. Then, loose connection
long enough for protocol reset to also fail. This should be
an infrequent event unless connections are being disrupted
at the protocol level. Note: Received N_Port OLS primi-
tives invoke the Registered State Change Notification,
which prompts hosts to update their device information
through the switch SNS table (see “SNS Table” on
page 48).
RxOpenCLS Receipt of a CLS by the
port OPN.
The remote device on the loop is generating a CLS to the
port OPN. This indicates that a device is not allowing the
port to send data to it. If the counter increases, attempts to
send data out the port are affected and performance begins
to lower.
SelfReg Public devices on this port
that automatically regis-
tered with the Directory
Server and indicated their
FC4 type.
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SignalLoss Loss of signal. The loss of signal indicates it is unable to find and follow
the Rx Clock. The switch port will constantly attempt to
find the Rx clock with the assist of the Firmware code. If
the counter is changing frequently, this may indicate that
the device attached clock or our reference clock is not sta-
ble. When initially connected, a few Signal loss may be
indicated as a wiggling cable insertion will be in and out of
alignment for a few seconds.
SyncLoss Transitions of the physi-
cal level from a synchroni-
zation-acquired state to a
loss of synchronization
state.
The switch port is unable to find ordered sets. Until Signal
is found, this counter will not change. Sync loss can occur
if the data still follows Disparity but does not send Ordered
sets. This is very rare and will most likely follow the Sig-
nal Loss of Link Failure.
TxCLSOpen Transmission of a CLS
(close) after receiving an
OPN (open).
This counter increments when the port does not allow the
remote device to send data to it, indicating that the Rx
FIFO is full or busy. Frames in the queue are being held
due to a destination device not servicing frames. Frames
then back up in the destination port Tx queue until it does
not allow the router to send more; then the frames begin to
back up in the RX queue FIFO changing the CLS to an
OPN. This is a good indicator that a slow servicing device
may need tuning of data IO request size or Framing Size.
Port Link Statistics Columns
Port Link
Statistics
Columns
Occurrences being
Counted
Notes