HP StorageWorks 2.32 Edge Switch - Manual (Page 69)

Edge Switch Element Manager user guide 69
• Link resets Rx—The number of link reset protocol frames received by this port from the
attached device. The switch receives a link reset from an attached device if the device wishes to
initiate the link reset or recover from a link timeout.
• Link resets Tx—The number of link reset protocol frames received/transmitted by this port
from/to the attached device. The switch transmits a link reset to initiate the link reset protocol or
recover from a link timeout. This occurs normally to establish BB_Credit on any port in order to
recover lost BB_Credit.
• LIPS detected—A loop initialization primitive (LIP) was detected, which means the loop was
completed.
• LIPS generated—An LIP was created to initialize a loop.
Traffic statistics
This section describes the types of statistics that display when you click a port’s bar graph:
• Link Utilization % Rx and Link Utilization %Tx—There are separate values for receive
link utilization and for transmit link utilization. The larger of these two values is displayed on the
bar graph.
The current link utilization for the port is expressed as a percentage. This statistic shows the
percentage of the maximum link utilization currently being used. (If the port speed is 1 Gb/s, the
quantity of the maximum link utilization is 100 MB. If the port speed is 2 Gb/s, the quantity of
the maximum link utilization is 200 MB.) Link utilization is calculated over one-second intervals.
The maximum link utilization is 100%.
• Frames Rx—The number of frames that the port has received.
• Frames Tx—The number of frames that the port has transmitted.
• Four Byte Words Rx—The number of words that the port has received.
• Four Byte Words Tx—The number of words that the port has transmitted.
• Flows rerouted from ISL—The number of Fibre Channel traffic flows that were rerouted from
this ISL to another ISL due to congestion. This value increments only if the Open Trunking feature
is installed. A value would be displayed only if this port is connected to an ISL.
• Flows rerouted to ISL—The number of Fibre Channel traffic flows that were rerouted to this
ISL from another ISL due to congestion. This value increments only if the Open Trunking feature is
installed. A value would be displayed only if this port is connected to an ISL.
Troubleshooting tips
As a general rule, you should clear all counts after the system is stabilized. When looking at the
Performance view, roughly keep track of the time interval when errors accumulate to judge the
presence and severity of a problem. Also, recognize that a link recovery hierarchy is implemented in
Fibre Channel to handle some level of “expected anomalies.” In general, you need only be
concerned with error counts that increment very quickly.
Button functions
The two buttons located at the right end of the title bar on the Statistics Values table are:
• Refresh—Updates the data in the statistics tables and enables you to compare values at any
given time. Note that you can also refresh data by clicking the port’s bar graph.