A network administrator for a multinational corporation\'s sprawling campus network, which relies heavily on OSPF for inter-site connectivity, has observed persistent routing instability and intermittent packet loss following frequent link failures. To expedite network recovery, the administrator has reduced the Hold Down Timer values on several key OSPF routers. However, this action has seemingly worsened the situation, leading to more frequent and prolonged periods of unpredictable routing behavior. Which of the following adjustments would most effectively address the underlying cause of this exacerbated instability?