Crystal Vision
VisionWeb
Traps
Whenever a status or control value changes, a trap will be sent to the SNMP manager unless
filtered (see MIB for trap OIDs). By interrogating this trap it is possible to identify the status
change and its consequences. It will be quite common for multiple traps to be sent for any one
incident – for example, removing an input may typically trigger eight traps. It will then be down to
the SNMP manager to sort these into a hierarchical order or mask as necessary.
Example of a trap received by the SNMP manager
Filters
Any status or control value change can potentially send a trap but these can be filtered by
information in the configuration file. The following extract from the MIB tree shows two events
with their OIDs that will generate traps if a card is found or lost:
Indigo 2AE and 2SE User Manual R1.17
34
27 February 2020