Under which hierarchy is OSPF configured?

OSPF (Open Shortest Path First) is a link-state routing protocol that falls under the category of Interior Gateway Protocols (IGP). When configuring OSPF in a network, it is essential to place it within the appropriate hierarchy in a routing device's configuration tree.

In network device configurations, specifically within Junos OS, OSPF is designated to be configured under the IGP section. This is because OSPF is one of the main protocols used for internal routing within an autonomous system. By placing OSPF under the "protocols igp" hierarchy, it clearly identifies that the configuration pertains to an internal routing protocol and allows the network administrator to configure relevant attributes such as areas, interfaces, and other OSPF-specific parameters effectively.

This classification is crucial as it allows for proper organization and management of routing protocols, ensuring that all configurations related to OSPF are easily accessible and recognizable.