You can upgrade or downgrade an initiator router interface as needed. The configuration of the receiver will change along with the change of the configuration of the initiator router interface.
Log on to the Express Connect console.
In the left-side navigation pane, select VPC Connection > Router Interface.
Select the region where the target initiator router interface is located.
Click More > Upgrade or More > Downgrade in the Actions column of the target router interface.
Select a new configuration as needed and click Pay. The configuration change will take effect immediately.