Save Big on Coursera Plus. 7,000+ courses at $160 off. Limited Time Only! Grab it Explore key rotation and keychains in OSPF authentication through this comprehensive video tutorial. Learn how routers can change authentication keys without disrupting neighbor adjacencies, and discover the implementation of more secure hashing algorithms like hmac-sha. Dive into practical demonstrations using GNS3, covering key rollover processes, wire-level changes during rollover, and the advantages of SHA and HMAC over MD5. Gain hands-on experience with keychain configurations, including backwards compatibility with MD5 and implementation of hmac-sha. Master date-based key rollover techniques and understand the key takeaways for effective OSPF authentication management.