User manual

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McDATA Sphereon™ 4500 Fabric Switch Product Manager User Manual
Monitoring and Managing the Switch
• Link Resets
The number of link reset protocol frames received/transmitted by
this port from/to the attached switch. The switch transmits a link
reset to initiate the link reset protocol or recover from a link
timeout. 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.
There are not thresholds for these values. You may determine that
a problem exists by the rate that the value changes.
•LIPS
The number of Loop Initialization Primitives (LIPS)
generated/detected by this port. These cause re-initialization of
the port.
• 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 OpenTrunking feature is installed. A value
would only display if this port is connected to an ISL.
• 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 OpenTrunking feature is installed. A value
would display 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 there is a
link recovery hierarchy implemented in Fibre Channel to handle
some level of “expected anomalies.” In general, only be
concerned with error counts that increment very quickly.