The authentication method "none" means that no authentication is used for OSPF and it is the default method. OSPF authentication can either be none (or null), simple, or MD5. You can enable authentication in OSPF in order to exchange routing update information in a secure manner. This document shows sample configurations for Open Shortest Path First (OSPF) authentication which allows the flexibility to authenticate OSPF neighbors. Refer to Cisco Technical Tips Conventions for more information on document conventions. If your network is live, ensure that you understand the potential impact of any command. All of the devices used in this document started with a cleared (default) configuration. The information in this document was created from the devices in a specific lab environment. The information in this document is based on these software and hardware versions. ![]() Refer to the or information on the OSPF routing protocol. Readers of this document must be familiar with basic concepts of OSPF routing protocol. This document describes how to configure Open Shortest Path First (OSPF) authentication and allow the flexibility to authenticate OSPF neighbors.
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June 2023
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