Discovery Tasks

The discovery process for network device divides into multiple Tasks. The TASK is a data collection related to a specific network protocol or technology (MPLS, Transceivers, ARP Table, Spanning-Tree Protocol, Multicast, or VXLAN). Each task consists of 1 or more operational commands (CLI or API). You can find the list of all Discovery Tasks in the Feature matrix.

Some fundamental TASKS required for discovery and topology calculations cannot be disabled (Neighbors, ARP, Mac, RIB, etc.)

The Discovery Tasks settings are introduced in version 3.7.0. Since then, the user can manipulate specific tasks for the discovery process to avoid extra data collection (when particular protocols are not present on the network) or avoid specific operational commands to be executed on specific hardware platforms.

By default, there are three main Discovery Task rules in the platform:

Rule Name

Rule Description

Rule Name

Rule Description

Disable Pagination

By default disabled for F5 devices - command is modifying the configuration and can break cluster synchronization.

Transceivers

By default disabled for all vendors - certain Cisco platforms may be affected by a memory leak bug and lead to device crash or hung VTY line. More at Known Issues > Cisco

NTP

By default disabled for Cisco Firepower - on some versions a Firepower bug may freeze the CLI session

In the following example, we are creating a rule to disable OSPFv3 on Juniper EX. The test for the rule reveals one match, the HWLAB-JEX2200-SW1 switch: