Dynamic Routing Metric Lab
Calculate OSPF Cost and EIGRP Composite Metrics for multi-path link selection and path manipulation.
This link will be preferred over links with a higher cost value in the same OSPF area.
What does the Routing Metrics Calculator do?
This tool helps explain how routing protocols choose a preferred path. It focuses on OSPF cost logic and EIGRP-style composite thinking, using bandwidth, delay, and reference values to show why one route may win over another.
Why routing metrics matter
Routing metrics affect failover, load distribution, WAN design, and traffic engineering. A wrong metric can push traffic through a slow backup path, create asymmetric routing, or hide the intended primary circuit.
Who benefits from it?
Network engineers, certification students, NOC teams, MSPs, and anyone designing routed networks can use it to learn or validate path preference before changing router configuration.
FAQ
What is OSPF cost? OSPF cost is usually calculated from reference bandwidth divided by interface bandwidth.
Why change reference bandwidth? Modern links can be faster than older defaults, so reference bandwidth may need tuning to distinguish 1G, 10G, and faster links.
Does the lowest metric always win? Usually yes within the same routing protocol and route type, but administrative distance, policy, and route source can also matter.