OSPF is supported in Cisco IOS ® Software Releases 10.0 and later. OSPF can be configured in all routers, such as the Cisco 2900 series, and Layer 3 switches. The information in this document is based on the software and hardware versions listed: And refer to the Open Shortest Path First (OSPF) Support Page for more information about OSPF. To learn more about IP routing protocols, refer to How to Configure Basic IP Routing. This document requires a basic knowledge of IP routing protocols and also the OSPF routing protocol. This document describes common problems with how Open Shortest Path First (OSPF) neighbors become fully adjacent.
