Which command would you use to obtain a summary of OSPF interface statistics?

To obtain a summary of OSPF interface statistics, using the command to retrieve OSPF interface information is the most straightforward and relevant choice. This command displays various details about OSPF interfaces, including state, IP address, area information, and metrics. It provides a clear overview of how OSPF is configured on each interface and the operational statistics associated with them, which is vital for troubleshooting and network performance monitoring.

The other choices focus on different aspects of OSPF or network diagnostics. For instance, the command related to OSPF neighbors provides insights into the neighboring routers and their statuses, while the command for the OSPF database offers details about OSPF's link-state database rather than interface-specific statistics. The command concerning sys HA (high availability) deals with the status of high availability clusters and is unrelated to OSPF interface statistics. Thus, the command pertaining to OSPF interface information is the most appropriate for summarizing interface statistics specifically.