What indicates the History status code in the BGP table?

The History status code in the BGP table signifies that BGP has learned a particular network but does not have a valid route for it. This can occur in several scenarios, such as when a route was previously valid but has since become invalid due to changes in network topology, or if the route is unavailable but was previously reachable.

The presence of the History status indicates that BGP retains information about the route, even if it is not currently usable for forwarding traffic. This is important for troubleshooting and network design, as it allows network administrators to understand the historical context of route availability and aids in making decisions about route selection and policy.