2.4 Configure, verify and troubleshoot single area and multiarea OSPFv2 for IPv4 (excluding authentication, filtering, manual summarisation, redistribution, stub, virtual-link, and LSAs) – Alex Wilkins Technology Portfolio
Module 4 OSPF Overview and Configuration - ppt download
Troubleshooting Duplicate Router IDs with OSPF - Cisco
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Steps of Configuring the Router ID - GeeksforGeeks
Configuring IP parameters for routing switches
OSPF Advanced Concepts - Part 4
Cisco CCNA OSPF Part V
OSPF Router ID : Identify OSPF routers | How the OSPF works | N-Study