Nuggets in the Configuration Alarms Category

NNM examines device configuration information periodically according to the schedule set in the polling configuration GUI. NNM reports any changes, errors, or inconsistencies as a configuration event. It is the author’s humble opinion that the configuration alarms category is the most useful NNM feature of all. It’s the network manager’s friend. Here is a list of common configuration alarms NNM may report:

• a device subnet mask differs from the correct one for that subnet

• the MAC address of a device changed

• a device’s route points to a device that’s not a router

• the name of a device changed

• a new interface is found in a device

• a new node is discovered or deleted

• a device’s sysObjectID changed