Supported MIBs
History Group
The History group records periodic statistical samples from the collision domain and stores them in an SNMP table for later retrieval.
The History group allows the manager to set a timer to record samples of Ethernet statistics. It allows baselining of network activity over time.
Once samples are taken, the sample data is stored in an entry in a
Alarm Group
The Alarm group periodically takes statistical samples from variables and compares them to previously configured thresholds. The alarm table stores configuration entries, each of which defines a polling period and various threshold values.
If a monitored variable exceeds a threshold value, the switch generates an event. No more events are generated for that threshold until the opposite threshold is exceeded.
You can limit the generation of events via the MIB. When sampling a delta value, you can increase the precision of the sample by taking the sample twice per period and comparing the sum of the latest two samples to the threshold. This allows the switch to detect threshold crossings that span the sampling boundary. This does not require any special configuration of the threshold value.
This group requires the implementation of the Event Group.
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