Cisco 11503 Administration Guide - Page 243

Chapter 6 Configuring Remote Monitoring (RMON) Configuring an RMON Alarm To see a list of SNMP variables, use the sample-variable ? command. For example: (config-rmonalarm[1])# sample-variable ? apSvcLoadInfoTimeout apSvcLoadSvcStatRptTimeout apSvcLoadEnable apSvcLoadDecayInterval apSvcLoadStepStatic apSvcLoadStepSize apSvcLoadThreshold ... To remove the sample variable, enter: (config-rmonalarm[1])# no sample-variable Defining the Absolute or Delta Sampling Method When you configure an alarm, you can define the sampling method to compare the sample value of a MIB object to either: • The configured threshold directly. This sampling is similar to a gauge, recording the value as it fluctuates up and down (see Figure 6-2). • The previous sampling, and then their difference is compared to the configured threshold. This sampling is similar to a counter, recording the value that constantly increases (see Figure 6-3). Absolute sampling compares the sample value to the configured threshold. For example, if you want to know when 30,000 service connections occur on the CSS during a sample interval, configure the apSvcConnections MIB object with absolute sampling. The apSvcConnections object is the current number of connections on a service. To define an absolute sampling, enter: (config-rmonalarm[1])# sample-type absolute Delta sampling (the default sampling method) compares the current sample value with the previous sample and compares their difference to the configured threshold. For example, if you want to know when the number of content rule hits increase by 100,000 as compared to its previous sampling, configure the apCntHits MIB object with delta sampling. apCntHits is an ever-increasing count of hits. OL-5647-02 Cisco Content Services Switch Administration Guide 6-17