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Modifying the IS-IS Metric

All IS-IS routes have a cost, which is a routing metric that is used in the IS-IS link-state calculation. The cost is an arbitrary, dimensionless integer that can be from 1 through 63, or from 1 through 2²⁴–1 (16,777,215) if you are using wide metrics. The default metric value is 10 (with the exception of the lo0 interface, which has a default metric of 0). To modify the default value, include the metric statement:




metric metric;

For a list of hierarchy levels at which you can include this statement, see the statement summary section for this statement.

For more information about IS-IS interface metrics, see Modifying the Interface Metric.

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