Cisco 11503 Administration Guide - Page 236

Configuring an RMON Alarm Chapter 6 Configuring Remote Monitoring (RMON) Suspending an RMON Event Suspending an RMON event deactivates it, allowing you to make changes to its configuration settings. Use the suspend command to suspend an event. When you suspend an RMON event, ensure that the event is not assigned to an RMON alarm. For example: (config-rmonevent[1])# suspend Configuring an RMON Alarm An RMON alarm allows you to monitor a MIB object for a desired transitory state. An alarm periodically takes samples of the object's value and compares them to the configured thresholds. RMON allows you to configure two types of sampling, absolute and delta: • Absolute sampling compares the sample value directly to the threshold. This sampling is similar to a gauge, recording values that go up or down. • Delta sampling subtracts the current sample value from the last sample taken and then compares the difference to the threshold. This sampling is similar to a counter, recording a value that is constantly increasing. When a sample value crosses an alarm threshold, an associated event is generated. To limit the number of generated events, only one event is generated when a threshold is crossed. The CSS does not generate additional events until an opposite threshold is crossed. For example, when a rising threshold is crossed, one event is generated. The next event occurs only when a falling threshold is crossed. When you associate an event to an alarm and an alarm occurs, the event defines the action the CSS takes when an alarm occurs. For more information on events, see the "Configuring an RMON Event" section. 6-10 Cisco Content Services Switch Administration Guide OL-5647-02