The default-route imported command configures MBGP to add default routes to the MBGP routing table.
The undo default-route imported command restores the default configuration.
By default, MBGP does not add default routes to the MBGP routing table.
Usage Scenario
To import default routes, you need to run both the default-route imported command and the import-route command. If only the import-route command is used, default routes cannot be imported. In addition, the default-route imported command is used to import only the default routes that exist in the local routing table.
When a device needs to advertise default routes to a peer or a peer group and no default route exists in the local routing table, the peer default-route-advertise command needs to be used.