Hitachi

JP1 Version 12 JP1/Network Node Manager i Setup Guide


6.2.2 Creating auto-discovery rules

Organization of this subsection

(1) Configuring auto-discovery rules

When you configure auto-discovery rules, you specify the following:

(2) Auto-discovery rule ordering

The value of an auto-discovery rule's Ordering attribute affects discovery ranges in the following ways:

(3) Excluding devices from discovery

(4) Ping sweep

You can use Ping sweep to locate devices within the IP address ranges of the configured auto-discovery rules. For initial discovery, you might want to enable Ping sweep for all rules. Doing so provides enough information to NNMi discovery that you do not need to configure discovery seeds.

Note
  • Ping sweep works for subnets of 16 bits or smaller, for example, 10.10.*.*.

    Ping sweeps are especially useful for discovering devices across a WAN that you do not control, such as an ISP network.

  • Because firewalls often regard Ping sweeps as attacks on the network, a firewall might block all traffic from a device that emits Ping sweeps.

Tip

Enable Ping sweep for small discovery ranges only.

(5) Discovery hints from SNMP traps

NNMi processes the source IP addresses of received SNMP traps as hints to auto-discovery rules. For details about SNMP trap incidents, see NNMi Help for Administer.

(6) Discovery seeds for auto-discovery rules

Provide at least one discovery seed per auto-discovery rule. The options for providing the seeds are listed below. Specify one or a combination of these discovery seeds.

(7) Best practices for auto-discovery rules

(8) Examples

Discovery rule overlap

Figure 6-1 shows two discovery ranges that overlap. The circle on the left represents an IP address range or a system object ID range to be ignored by NNMi discovery. The circle on the right represents an IP address range or a system object ID range to be discovered and included in the NNMi topology. The overlapping region might be included or ignored by discovery, depending on the ordering of the auto-discovery rules.

Figure 6‒1: Overlapping discovery ranges

[Figure]

Limit device type discovery

To discover all HP devices in your network that are not printers, create one auto-discovery rule with a range to include the HP enterprise system object ID (1.3.6.1.4.1.11). In this auto-discovery rule, create a second range to ignore the system object IDs of HP printers (1.3.6.1.4.1.11.2.3 9). Leave the IP address range unset.