Monitoring full and partial discovery progress

You can use the Monitoring tab to monitor the progress of the current full or partial discovery through each of the discovery phases.

About this task

Complete the following steps to monitor the progress of the current full or partial discovery.

Procedure

  1. Click the Discovery icon and select Network Discovery Status.
  2. Select a domain.
  3. Click the Monitoring tab.
  4. Start either a full or partial discovery by selecting the option from the Start Discovery button Start Discovery combo button. Can be used to start partial or full discovery..

Results

The following phases are shown in the table.

Interrogating Devices
During this phase, devices are first discovered by the finders, and then information is retrieved from the devices by the agents. This phase is also known as phase 1.
Resolving Addresses
During this phase, the agents resolve IP to MAC address translations. This phase is also known as phase 2.
Downloading Connections
During this phase, the switch agents download the forwarding tables from the switches in the network. This phase is also known as phase 3.
Correlating Connections
During this phase, the connectivity between the devices is calculated, the containment model is created, and the network topology is built. This phase is also known as phase -1.

You can see which phase the current discovery is in by looking at the Status column of the table. If a phase has not started, this column is empty. If a phase is in progress, this column shows a spinning wheel icon. If a phase has completed successfully, this column shows a green tick icon.

Status
Shows the status of a particular phase. The column shows the following kinds of status.
Table 1. Discovery phase status
State Icon Description
Completed Finished If a phase has completed successfully, this column shows a green tick icon.
In progress Starting, In progress, or Refreshing If a phase is in progress, this column shows a spinning wheel icon.
Not started   If a phase has not started, this column is empty.
You can see how long each phase is taking in the Elapsed Time column in the table. Each phase takes a different amount of time depending on the scope of the discovery, the complexity of the network, and the amount of detail being retrieved from the devices. If the elapsed time continues to increase, and the work completed does not increase, the discovery might be encountering problems.
Remember: In the first phase, the count of IP addresses discovered stops increasing part way through the phase. This is part of the normal operation of the discovery. The count of IP addresses discovered only increases during the first part of the phase, while the finders discover new devices. In the latter part of the phase, the discovery agents retrieve information from these devices, and new IP addresses are not discovered.

The Discovery Agents section shows the progress of the discovery agents. If you think that a phase is taking too long to complete, click the Discovery Agents tab to see what the discovery agents are doing.

You can see the progress within a phase in the Work Completed column in the table. For the first phase, this column shows the number of IP addresses found so far. For the other phases, this column shows the percentage of work completed in the phase.