Operations Manager can monitor physical network routers and switches, including the interfaces and ports on those devices, the virtual local area networks (VLANs) and Hot Standby Router Protocol (HSRP) groups that they participate in, and firewalls and load balancers. Operations Manager can monitor network devices that support a Simple Network Management Protocol (SNMP) and can provide port monitoring for devices that implement interface MIB (RFC 2863) and MIB-II (RFC 1213) standards.

Operations Manager provides the following monitoring for discovered network devices:

When you create a discovery rule, you designate a management server or gateway server to run the rule. Each management server or gateway server can run only one discovery rule. You might want to strategically place management servers on different network segments so that they can access the network devices that they are discovering.

Discovery rules run on a schedule that you can specify, and you can also run a rule on demand. Each time the discovery rule runs, it attempts to find new devices within its definition or changes to devices that were previously discovered. A discovery rule can perform explicit discovery or recursive discovery.

A discovery rule can perform only explicit or recursive discovery, but cannot perform a combination of discovery types. You can change the discovery type of a rule after the rule is created. If you know all the network devices that you want discovered, you should use explicit discovery. Recursive discovery can discover devices that you have no business requirement to monitor and as a result, can increase the administrative workload of monitoring your network.

A discovery rule can discover any combination of SNMP v1, v2, and v3 devices. SNMP v3 devices can only be discovered by explicit discovery or by being specified in a recursive discovery rule. If you specify an SNMP v3 device in a recursive discovery rule, the SNMP v3 device will be discovered but devices connected to it will not be discovered. If you specify an SNMP v1 or v2 device in a recursive discovery rule, only SNMP v1 and v2 devices connected to it will be included in the recursive discovery.

See Also