In Huawei’s CloudFabric solution, in the scenario where the Border Leaf and Service Leaf are separated, what are the correct descriptions of the following principles for traffic orchestration between internal and external networks?

In Huawei’s CloudFabric solution, in the scenario where the Border Leaf and Service Leaf are separated, what are the correct descriptions of the following principles for traffic orchestration between internal and external networks?
A . The controller creates the corresponding tenant VRF and egress VRF on the Border Leaf based on the tenant network and the external network
B . The route to the external network on the border leaf is delivered by the iMaster NCE-Fabric controller, and only static routes can be delivered to connect with the external network
C . The controller creates the corresponding tenant VRF and egress VRF on the Service Leaf based on the tenant network and the external network
D . The backhaul route from the external network to the tenant network needs to be configured by the external network and cannot be delivered by the iMaster NCE-Fabric controller

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Answer: C D