Lab 4: Single-Area OSPFv2 - Path Selection and Interface Cost Tuning
Dynamic routing protocols like OSPF dynamically calculate the shortest path through a network using link metrics. By default, OSPF calculates interface cost based on reference bandwidth (100 Mbps / bandwidth). However, in modern networks with disparate WAN links (such as high-speed fiber vs. low-bandwidth backup copper), default calculations may not accurately reflect desired traffic paths. To enforce traffic engineering, network administrators manually tune OSPF interface costs to prefer primary fiber paths over backup links. ...