Scoping discovery

To scope the discovery for IP-based devices and subnets, define the zones of the network (that is, subnet ranges) that you want to include in the discovery, and the zones that you want to exclude.

About this task

You can define as many zones as necessary. You can add new zones, or edit or delete existing zones. Zones can be specified within zones: within a given inclusion zone, you can specify devices or subnets that are not to be detected. These devices are not pinged by the Ping finder or interrogated by the discovery agents. For example, you can define an include scope zone consisting of the Class B subnet 1.2.0.0/16, and within that zone you can specify an exclude scope zone consisting of the Class C subnet 1.2.3.0/24. Finally, within the exclude scope zone you could specify an include scope zone 1.2.3.128/26.
Note: This procedure can only be used to configure scoping for IP-based entities. Non-IP entities such as layer 1 optical devices and certain radio access network devices must be scoped by configuring a prediscovery filter in the Filters tab.

To scope the discovery:

Procedure

  1. Click the Discovery icon and select Network Discovery Configuration.
  2. From the Domain list, select the required domain.
  3. Click Scope.
  4. To add a new scope zone, click New New button.
    The Scope Properties page is displayed.
  5. Complete the fields as follows and then click OK.
    Action
    Define the subnet range as an inclusion zone or exclusion zone. If the subnet range is an inclusion zone that you intend to ping during the discovery, click Add to Ping Seed List. Clicking this option automatically adds the devices in the scope zone as a discovery seed devices.
    Restriction: The Add to Ping Seed List option is not available for IPv6 scope zones. This prevents ping sweeping of IPv6 subnets, which can potentially contain billions of devices to be pinged. Ping sweeping of IPv6 subnets can therefore result in a non-terminating discovery.
  6. To edit an existing scope zone, click the required row. On the Scope Properties page, edit the properties as described in step 5.
  7. To delete an existing scope zone, select the Select check box next to the required row or rows and click Delete Delete row button.
  8. Click Save Save button.

What to do next

If you are performing NAT address mapping, you must configure the NAT gateways and return to the Scope tab to set the address mapping.