Technical data

318 FastIron Ethernet Switch Administration Guide
53-1002637-02
Configure system monitoring
Sysmon starts the timer based on the specified timer setting, with the default value as three
minutes. After the interval specified by the timer, the utility checks the hardware error registers. If
the sysmon utility detects an error in a hardware error register, it increments the relevant error
count by 1. Otherwise, it restarts the timer and waits for the given interval. Hardware error registers
are cleared when read, so after Sysmon reads the value, they are reset to zero.
Sysmon checks the value of the error counters it maintains and the values specified in the sysmon
threshold. If the value of the error counters exceeds the matching threshold, it takes the action
specified (logs internally or to the syslog). Otherwise, it restarts the timer and waits for the specified
interval before checking for errors again.
To ensure that logging repeating errors does not cause the logs to overflow, you can specify a
back-off value that allows the utility to skip the specified number of error instances before logging
again. If the error count is smaller than the specified log back-off value, the utility logs the error to
the internal log or syslog, restarts the timer and waits for the specified interval before checking for
errors again.
Configuration notes and feature limitations
• While system monitoring is supported on all FastIron devices, the types of errors monitored
vary according to devices. On FSX devices, the sysmon utility monitors the following for errors:
• Fabric Adapter (FA) for processing and link errors.
• Cross Bar (XBAR) or Switch Fabric Module (SFM) for processing and link errors.
• Packet processor (PP) for link errors.
On FCX and ICX devices, the sysmon utility monitors the following errors:
• Link errors.
• ECC errors.
• By default, system monitoring starts on system boot up and runs in the background every three
minutes. You can configure, disable, or enable, the time interval through the CLI; however, if
you define the system monitoring interval at the global level, this value overrides the individual
settings. Valid range for the sysmon timer is 1 to 60 minutes.
• You can define a system monitoring threshold that is defined as N/W, where N is the number
of error events in a specified window (W) of consecutive polling periods. When the threshold is
reached, the action that is defined is performed. The threshold enables the sysmon utility to
ignore random errors that occur because of corrupted data coming in to the device, and
perform the action only for errors generated because of device failure. A threshold of 1/W
means no threshold.
• You can choose the log action as either to the internal sysmon buffer or to the syslog. If you
choose the internal sysmon buffer, logs that are written beyond the limit of the sysmon buffer
rolls over. On the other hand, if you choose logging to syslog, messages are sent to the
configured syslog servers.
Configure system monitoring
You can use the following commands at the privileged EXEC level to globally configure the sysmon
utility:
• disable system-monitoring all