As required, perform an IGP impact analysis.

1. Configure a historical IGP impact analysis and the time range for the analysis. See To configure an IGP impact analysis for more information.

2. Configure IGP history from the IGP topology map. See To configure IGP history from the IGP topology map for more information.

3. Compare checkpoints on an IGP history topology map. See To compare checkpoints on an IGP history topology map for more information.

As required, perform a BGP impact analysis.

1. Configure the CPAA to register BGP events. See the 7701 CPAA Setup and Installation Guide for more information.

2. Configure a historical BGP impact analysis. See To configure a historical BGP impact analysis for more information.

3. Configure the BGP event manager. See To configure the BGP event manager for more information.

4. Configure the BGP event retrieval. See To configure BGP event retrieval for more information.

As required, perform a VPRN BGP impact analysis. See To configure a VPRN BGP impact analysis for more information.

As required, perform a service impact analysis. See To configure a service impact analysis for more information.

As required, view specific topology changes on an IGP history topology map. See To view specific topology changes on an IGP history topology map for more information.

As required, perform a composite service impact analysis. See To configure a composite service impact analysis for more information.

As required, create and manage checkpoints using the Checkpoint Manager or contextual menu on the topology map.

• Create an OSPF checkpoint for all of the OSPF area within an IGP administrative domain. See To create an OSPF checkpoint for more information.

• Configure OSPF checkpoints in an IGP administrative domain. See To configure OSPF checkpoints in an IGP administrative domain for more information.

• Create checkpoints on OSPF areas from an OSPF topology map. See To create checkpoints from an OSPF topology map for more information.

• Create an ISIS checkpoint for all of the ISIS routing domains within an IGP administrative domain. See To create an ISIS checkpoint for more information.

• Configure ISIS checkpoints in an IGP administrative domain. See To configure ISIS checkpoints in an IGP administrative domain for more information.

• Create checkpoints on ISIS routing domains from an ISIS topology map. See To create checkpoints from an ISIS topology map for more information.

• Create checkpoints on an OSPF area or ISIS routing domain from an IGP topology map. See To create checkpoints from an IGP topology map for more information.

• Create an administrative domain checkpoint schedule policy, as required. See To create an Admin Domain checkpoint schedule policy for more information.

• Force delete the IGP history, as required. See To force delete the IGP history for more information.

View the details of impacted IP and paths, LSPs, and affected services. See To view OSPF topology checkpoints to To view checkpointed topology objects for more information.

Navigate to impacted IP paths, LSPs, and affected services on topology maps.

Compare the checkpoints. See To compare checkpoints for more information.