Extreme Networks ExtremeWare 7.7, Справочник по командам

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ExtremeWare 7.7 Command Reference Guide 663
10
Commands for Status Monitoring and
Statistics
This chapter describes commands for:
• Configuring and managing the Event Management System and logging
• Enabling and disabling NetFlow flow statistics collection (“ i ” series platforms only)
• Configuring flow-collection port and filtering options (“ i ” series platforms only)
• Configuring the flow-collector devices to which NetFlow datagrams are exported (“ i ” series
platforms only)
• Enabling, disabling, and configuring sFlow
®
statistics collection (“ i ” series platforms only)
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 time 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 are occurring consistent with expected behavior.
— Debug-Summary, Debug-Verbose, and Debug-Data—These provide 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