The metric-delay normalize interval command configures link delay and cost normalization in an IS-IS process.
The undo metric-delay normalize interval command cancels the normalization of link delay costs in an IS-IS process.
By default, no delay tolerance is configured for an IS-IS process, and the metric value used for delay-based path computation is the original value.
Usage Scenario
For the delay-based Flex-Algo algorithm, the delay difference of each link is basically different, and the difference may be small. However, even if the difference is small, only one optimal path can be generated according to the existing SPF algorithm. Load balancing cannot be performed within a certain delay tolerance range, and therefore link resources on the network cannot be fully utilized. To solve this problem, the delay on the link is normalized first. The delay of links with a small difference or an acceptable difference is normalized to implement load balancing, making full use of link resources on the network.
Precautions
If delay normalization is configured in both the process view and the interface view, the configuration on the interface view takes effect preferentially. After the interface configuration is canceled, the normalized configuration in the process takes effect.