CCIE Enterprise - OSPF Lab Topology -1 - Initial + Full Configs

OSPF (Open Shortest Path First) is a link-state routing protocol that dynamically calculates the shortest path between routers using Dijkstra’s algorithm. It operates within an autonomous system (AS) and supports hierarchical network design through the use of areas, reducing routing overhead and improving scalability. OSPF exchanges link-state advertisements (LSAs) to maintain a synchronized and loop-free topology. It supports equal-cost multipath (ECMP), fast convergence, and features like authentication, route summarization, and stub areas for optimized performance. OSPF runs directly over IP (protocol number 89) and is widely used in enterprise and service provider networks for its efficiency and flexibility.

You will practice these in this lab:

• Configure single area and multi area OSPF implementation
• Configure area types (Normal, Stub, Totally stubby, NSSA, Totally NSSA)
• LSA types
• Redistribution and metric types
• Authentication (Area-wide and interface level)
• OSPFv3 and address-families
• Tunnels and virtual-links

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The default username and password for images used in this course is as follows, however you will hear new passwords during the course if the instructor changes the credentials: 

** For Cisco XRv you are asked for a username and password in the loading process. You can add any username and password other than admin, root, sysadmin and other reserved usernames. Go with something like Alex/cisco e.g.

Then when completely loaded, you can use cisco/cisco or admin/admin.

***For XRv9K Full image you are asked for a username and password in the loading process. You then login using the username and password that you set.