Configure an Included Interface Ranges filter

[This is the Context-Sensitive Help topic for the Discovery Config: Included Interface Ranges form.]

Sometimes there are certain types of interfaces in your environment that you want NNMi to discover. For example, you might have large devices with thousands of interfaces and want NNMi to discover and monitor only a subset of the interfaces in these devices.

This configuration setting instructs Spiral Discovery to only request data about a subset of Interfaces within the specified vendor/make/models (determined by MIBII sysObjectID) .

Rather than requiring that you specify each interface, NNMi enables you to use the System Object ID prefix (SNMP MIBII sysObjectID) and the ifIndex values to specify a range of interfaces that you want NNMi to discover. Use the Configuration > Device Profiles view to see the list of all known system object IDs at the time NNMi released.

To include Interfaces in the Spiral Discovery process using Included Interface Ranges:

1. Complete all prerequisites.

2. Navigate to the Included Interface Ranges tab.

   1. From the workspace navigation panel, select the  Configuration workspace.
   2. Expand Discovery.
   3. Select Discovery Configuration.
   4. Select the Included Interface Ranges tab.

3. Do one of the following:

   • To specify an Interface Range to include in Spiral Discovery, click the New icon, and continue.
   • To edit an Included Interface Ranges setting, double-click the row representing the configuration you want to edit, and continue.
   • To delete an Included Interface Ranges setting, select a row, and click the Delete icon.
   • To refresh the list of Included Interface Ranges settings, click the Refresh icon.

4. Provide the required basic settings (see the Basics table)

   Many routers have thousands of interfaces. If you want NNMi to actively discover and monitor a subset of those interfaces, consider an Included Interface Range that specifies only those interfaces you care about. For example:

   sysObjectID = Nortel and ifIndex = 1-256 (or any range that reflects reality in your network environment)
   
   

   Caution Be careful about determining which Interfaces are important to your team. Make sure all key interfaces (such as Loopbacks) are in the specified ifIndex range.

5. Click  Save and Close. Spiral Discovery implements your changes during the next regularly scheduled discovery interval. To apply the changes immediately, use Actions > Polling > Configuration Poll.

   You can also right-click any object in a table or map view to access the items available within the Actions menu.

6. To further refine the Interfaces you want Spiral Discovery to discover, use the Excluded Interfaces tab.

   NNMi first checks for any Included Interface Range filter and then ignores data about any interfaces that are specified using the Excluded Interfaces filter.

   Tip You can configure multiple ifIndex ranges for the same System Object ID prefix.

Included Interface Ranges Basic Attributes

Attribute	Description
System Object ID Prefix	Enter a prefix of an SNMP system object ID, or enter the entire SNMP system object ID. NNMi finds the longest (or most specific) matching system Object ID value. This means you can define generic rules for certain device families and more specific rules for specific device types. Do not use dashes or asterisks (*) in your system object ID value. Do not use a period (.) as the first character. A partial entry becomes a wildcard. For example, if you enter 1.3.6.1.4.1.11, discovery finds all devices. If you enter 1.3.6.1.4.1.9, discovery finds all Cisco devices. Tip You can configure multiple ifIndex ranges for the same System Object ID Prefix. For example, to configure Included Interface Ranges filters that specify ifIndex values 10 through 20 and 40 through 50 for the same node, create two Included Interface Range configurations for the same System Object ID Prefix. In the first Included Interface Range Filter, use the Low ifIndex Value 10 and the High ifIndex Value 20. Create a second Included Interface Range Filter using the Low ifIndex Value 40 and the High ifIndex Value 50.
Low ifIndex Value	Enter the lowest ifIndex value for the range of Interfaces you want to include in Spiral Discovery. Note the following The Low ifIndex Value must be equal to or greater than 1 and less than 2147483647. This value must be less than the High ifIndex Value
High ifIndex Value	Enter the highest ifIndex value for the range of Interfaces you want to include in Spiral Discovery. Note the following The High ifIndex Value must be greater than 1 and less than or equal to 2147483647. This value must be greater than the Low ifIndex Value.

Related topics

• Configure discovery
• Monitor Network Health