## How is routing metric calculated?

A routing metric is calculated by routing algorithms when determining the optimal route for sending network traffic. Metrics are assigned to each different route available in the routing table and are calculated using many different techniques and methods based on the routing algorithms in use.

### How does EIGRP determine the metric of a route?

Bandwidth: The bandwidth value used in the EIGRP metric calculation is determined by dividing 10,000,000 by the bandwidth (in kbps) of the slowest link along the path to the destination network.

#### What metrics does EIGRP composite metric use which ones is use by default?

EIGRP determines the value of the path using five metrics: bandwidth, load, delay, reliability and MTU. EIGRP uses Five different messages to communicate with its neighbor routers. EIGRP messages are Hello, Update, Query, Reply, and Acknowledgement.

How does EIGRP choose the best route?

By default EIGRP uses bandwidth and delay of the line to determine the best path to a remote network. However, if desired, EIGRP can use a composite of four metrics: bandwidth, delay, reliability, and load.

What is route metric value?

A metric is a value that’s assigned to an IP route for a particular network interface. It identifies the cost that’s associated with using that route. For example, the metric can be valued in terms of link speed, hop count, or time delay.

## What is metric in routing table?

A metric is typically one of many fields in a routing table. Router metrics help the router choose the best route among multiple feasible routes to a destination. The route will go in the direction of the gateway with the lowest metric.

### What is the metric for OSPF?

The OSPF metric for a route is the sum of the interface costs for all outgoing interfaces in the route. By default, a router’s OSPF interface cost is actually derived from the interface bandwidth: The faster the bandwidth, the lower the cost.

#### What is composite metric?

Composite metrics let you define a new higher-level metric by specifying an arbitrary set of mathematical transformations to perform on a selection of native metrics you’re sending us. You “compose” a new higher-level metric using the native metrics you send us as inputs.

What is composite metric in EIGRP?

If you have two EIGRP routes to the same place, the one with the lowest composite metric wins. So basically, a composite metric is a number calculated based on a number of different components that determines route preference.