A fallback cost of an Eth-Trunk interface helps adjust route selection dynamically.
If a member interface of an Eth-Trunk interface goes down, the remaining bandwidth of the Eth-Trunk interface may fail to meet user requirements. As a result, user services are affected. To address this problem, run the ospf cost-fallback command to configure cost-fallback parameters (fallback cost and bandwidth threshold) for the Eth-Trunk interface; if the remaining bandwidth of the Eth-Trunk interface goes below the bandwidth threshold, the cost of the interface is changed to the fallback cost which is higher than the normal cost, and traffic is then switched to an alternative path; when the remaining bandwidth of the Eth-Trunk interface reaches or exceeds the bandwidth threshold, the original cost is restored.
The system view is displayed.
The Eth-Trunk interface view is displayed.
A fallback cost is configured for an Eth-Trunk interface.
The configuration is committed.