HP 30-1002201 Loop Switch CLI Reference Guide (5697-5675, May 2006)

30-10022-01 loop switch CLI reference guide 29
Displaying Low-Level Link Information
This command displays low-level FC-1 traffic information for all ports.
To view the low-level link information for all ports:
From the Port Statistic Data menu (show/stat), type lowlevellink and press E
NTER.
Displaying High-Level Link Information
This command displays high-level FC-1 traffic information for all ports.
To view the high-level link information for all ports:
From the Port Statistic Data menu (show/stat), type highlevellink and press E
NTER.
Port Statistic Description
Sync Loss The number of times loss of word synchronization has occurred on the port for
a specified time. Synchronization loss occurs when the port stops receiving a
signal for a period of time.
Possible causes include:
• Poor connections or signal strength
• Rogue devices
• Intermittent hardware failures or line conditions.
Invalid OS The number of invalid ordered sets that have been detected. Ordered Set
(OS) or word errors can occur in bursts, which can potentially cause system
performance issues.
Possible causes include:
• Poor connections or signal strength
• Rogue devices
• Intermittent hardware failures.
Link Failure The number of times the link on a port has failed.
Link-Reset Tx The number of Link-Reset ordered sets transmitted on the port. A port enters
the Link-Reset transmit state to begin the link reset procedure. This is caused
by a link timeout or a connection error.
Link-Reset Rx The number of Link-Reset ordered sets received on the port. The Link-Reset
is performed upon receiving a Link-Reset. When a port is receiving
Link-Resets, it will begin transmitting idles.
OLS Tx The number of Offline-State ordered sets (OLS) transmitted on the port. A port
enters the Offline-State to perform initialization after a port has been powered
on or internally reset. A port also enters Offline-State prior to powering off or
performing internal diagnostics. OLSs are normal; however, high counts could
indicate problems.
OLS Rx The number of Offline-State ordered sets (OLS) received on the port. A port
enters the Offline-State when it receives the OLS primitive sequence. While in
this state, the port transmits the Link Reset (LR) primitive ordered set initiating
a Link Reset. OLSs are normal; however, high counts could indicate
problems.
Port Statistic 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.