Choose Tools→Route Analysis→Simulated Impact Analysis from the NFM-P main menu. The Simulated Impact Analysis form opens.

Click on the Create Scenario button. The Scenario (Create) form opens with the General tab displayed.

Configure the parameters:

• Scenario Name

• Description

Click on the IGP Topology tab button.

Configure the IGP Protocol parameter.

Note: You can specify only one IGP protocol for the impact analysis simulation.

Click on the MPLS Topology tab button.

Configure the Administrative State parameter.

Click on the Apply button.

Click on the Start Simulation button. The Creating a new IGP topology form opens.

Perform one of the following:

1. Create an empty topology:

   1. Select the Create an empty topology option.

   2. Click on the OK button. The Creating a new IGP topology form closes and the SIMULATION - IGP Model - Scenario topology map opens.

   3. Go to Step 12 .

2. Import a topology from an existing IGP administrative domain:

   1. Select the Import topology from an IGP Admin Domain option.

   2. Click on the Select button in the Import topology from an IGP Admin Domain panel. The Select IGP Administrative Domain form opens.

   3. Click on the Search button. A list of IGP administrative domains appears.

   4. Choose an IGP administrative domain and click on the OK button. The Select IGP Administrative Domain form closes and the Creating a new IGP topology form refreshes with the IGP administrative domain information.

   5. Specify whether you want to import LSPs. Choose one of the following:

      • Import All LSPs

      • Import Selected LSPs

   6. If you select Import Selected LSPs, click on the Selected LSP tab button. Otherwise, go to 11 .

   7. Click on the Add button. The Select... form opens.

   8. Click on the Search button. A list of LSPs appears.

   9. Choose one or more LSPs and click on the OK button. The Select... form closes.

   10. Click on the Import tab button.

   11. Specify whether you want to import IP monitored paths. Choose one of the following:

       • Import All IP

       • Import Selected IP Monitored Path

   12. If you select Import Selected IP monitored paths, click on the Selected IP tab button. Otherwise, go to 16 .

   13. Click on the Add button. The Select... form opens.

   14. Click on the Search button. A list of IP monitored paths appears.

   15. Choose one or more IP monitored paths and click on the OK button. The Select... form closes.

   16. Click on the Import button. The Creating a new IGP topology form closes and the Scenario (Edit) form appears.

3. Import a topology from an existing scenario:

   1. Select the Import topology from another scenario option.

   2. Click on the Select button in the Import topology from another scenario panel. The Select... form opens.

   3. Click on the Search button. A list of scenarios appears.

   4. Choose an entry and click on the OK button. The Select... form closes and the Creating a new IGP topology form refreshes with the scenario information.

   5. Click on the Import button. The Creating a new IGP topology form closes and the Scenario (Edit) form reappears.

   6. Go to Step 11 .

4. Import a topology from a checkpoint:

   1. Select the Import topology from a checkpoint option.

   2. Click on the Select button in the Import topology from a checkpoint panel. The Select... form opens.

   3. Click on the Search button. A list of checkpoints appears.

   4. Choose an entry and click on the OK button. The Select... form closes and the Creating a new IGP topology form refreshes with the checkpoint information.

   5. Click on the Import button. The Creating a new IGP topology form closes and the Scenario (Edit) form reappears.

   6. Go to Step 11 .

5. Import a topology from an OSPF area:

   1. Select the Import topology from an OSPF Area option.

   2. Click on the Select button in the Import topology from an OSPF Area panel. The Select... form opens.

   3. Click on the Search button. A list of OSPF areas appears.

   4. Choose an entry and click on the OK button. The Select... form closes and the Creating a new IGP topology form refreshes with the OSPF area information.

   5. Click on the Import button. The Creating a new IGP topology form closes and the Scenario (Edit) form reappears.

   6. Go to Step 11 .

6. Import a topology from an ISIS routing domain:

   1. Select the Import topology from an ISIS Routing Domain option.

   2. Configure the Level parameter.

   3. Click on the Select button in the Import topology from an ISIS Routing Domain panel. The Select... form opens.

   4. Click on the Search button. A list of CPAAs appears.

   5. Choose an entry and click on the OK button. The Select... form closes and the Creating a new IGP topology form refreshes with the CPAA information.

   6. Click on the Import button. The Creating a new IGP topology form closes and the Scenario (Edit) form reappears.

Perform the following to start the simulation:

1. Click on the IGP Topology View button. The Scenario (Edit) form closes and the SIMULATION - IGP Model - Scenario topology map opens.

2. Double-click on the Discovered Vertices object on the topology map. The Discovered L3 Objects form opens with the Routers tab displayed.

   Note:

   Any groups that are configured on the source topology map—OSPF Topology or ISIS Topology—are also imported. Any routers or subnets in the groups on the source topology map appear after the import.

   The OSPF virtual links are imported only if the transit area is visible in the IGP domain (a CPAA is connected to the transit area).

   Because checkpoints contain a single area, virtual links are not imported because the transit area is not visible.

3. Select all of the entries in the list, and drag and drop them on to the topology map.

4. Return to the Discovered L3 Objects form and click on the Subnets tab button.

5. Select all of the entries in the list, and drag and drop them on to the topology map.

6. Click on the Auto-layout button, if required. A dialog box appears.

7. Click on the Yes button. The dialog box closes.

Click on the Impact Analysis button on the SIMULATION - IGP Model - Scenario topology map to run the analysis. The Legend - SIMULATION - IGP Model - Scenario form opens with the Last Impact Results tab displayed. When the impact analysis is complete, Topology Converged is displayed.

Note: For quick reference to the last results of the impact analysis, you can keep the Legend - SIMULATION - IGP Model - Scenario form open while you are working with the simulation topology.

Click on the View Impact Details button, if required, to view the details of the impact analysis. The Action Event - Impact Analysis - SIMULATION - Scenario (Edit) form opens with the General tab displayed.

Click on the following tabs to view information about the impact analysis simulation:

• Attributes

• Scenario

• IP Paths

• LSP Paths

• Services

Close the Action Event - Impact Analysis - SIMULATION - Scenario (Edit) form.

Click on the Close button to close the Legend - SIMULATION - IGP Model - Scenario form.

Close the SIMULATION - IGP Model - Scenario topology map.

Close the Simulated Impact Analysis form.

End of steps