Extreme Networks ExtremeWare 7.3.0, Command Reference Manual

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ExtremeWare Software 7.3.0 Command Reference Guide 601
10
Commands for Status Monitoring and
Statistics
This chapter describes:
• Commands for configuring and managing the Event Management System/Logging
• Commands for enabling and disabling NetFlow flow statistics collection
• Commands for configuring flow-collection port and filtering options
• Commands for configuring the flow-collector devices to which NetFlow datagrams are exported
• Commands for enabling, disabling, and configuring sFlow® statistics collection
When an event occurs on a switch, the Event Management System (EMS) allows you to send messages
generated by these events to a specified log target. You can send messages to the memory buffer,
NVRAM, the console display, the current session, or to a syslog host. The log messages contain
configuration and fault information pertaining to the device. The log messages can be formatted to
contain various items of information, but typically a message will consist of:
• Timestamp: The timestamp records when the event occurred.
• Severity level:
— Critical: A desired switch function is inoperable. The switch may need to be reset.
— Error: A problem is interfering with normal operation.
— Warning: An abnormal condition exists that may lead to a function failure.
— Notice: A normal but significant condition has been detected; the system is functioning as
expected.
— Info: Actions and events that are consistent with expected behavior.
— Debug-Summary, Debug-Verbose, and Debug -Data: Information that is useful when performing
detailed trouble shooting procedures.
By default, log entries that are assigned a critical, error, or warning level are considered static entries
and remain in the NVRAM log target after a switch reboot.
• Component: The component refers to the specific functional area to which the error refers.
• Message: The message contains the log information with text that is specific to the problem.
The switch maintains a configurable number of messages in its internal (memory-buffer) log (1000 by
default). You can display a snapshot of the log at any time. In addition to viewing a snapshot of the log,
you can configure the system to maintain a running real-time display of log messages on the console
display or telnet session. In addition to maintaining an internal log, the switch supports remote logging
by way of the UNIX syslog host facility.