The correct answer is A. The VSF ports automatically forward the traffic for configured VLANs. In HPE Aruba Networking CX VSF, the VSF link ports are dedicated stack-fabric interfaces between VSF members. They are not configured like normal access or trunk ports for user VLAN forwarding. HPE Aruba Networking Central documentation for AOS-CX ports and LAGs notes that VLAN mode options such as access or trunk are not visible for VSF ports, which confirms that VSF ports are not manually configured as normal VLAN trunks. Once the VSF stack is formed, the stack operates as one logical switch, and the VSF links carry the necessary internal stack traffic automatically, including traffic associated with configured VLANs. Option B is incorrect because you do not configure VSF ports as trunk ports with vlan trunk allowed all. Option C is incorrect because vsf-sync is not required for VLAN forwarding across VSF links. Option D is incorrect because VLAN 4095 is not manually configured on VSF links for this purpose.
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