Which configuration allows for importing a rib-group?

The configuration that allows for importing a rib-group is found in the option that specifies the routing-options with interface-routes indicating rib-group inet myribgroup. This configuration enables a routing instance to import routes from a specific rib-group, which is essential for managing how routing information is handled within different routing instances.

When a rib-group is referenced in this context, it signifies that the routes held within that group can be made available to a particular routing instance. This is particularly useful in scenarios where different routing policies or instances need to share routes selectively based on defined criteria.

The notion of using rib-groups helps streamline route management and allows for more flexible routing architectures, especially in complex network setups involving multiple routing tables and instances. By pointing to the rib-group and setting the import configurations appropriately, network engineers can ensure that the routing instance has access to necessary routes without encapsulating all routing information from other instances.

Other options suggest different methods or configurations that may not specifically pertain to the import of a rib-group in the way defined by the question, which centers around loading external routes into specific instances. Understanding these configurations is vital for effective routing architecture and policy design in a Juniper networking environment.