The correct answer is C. The management port is used for multi-active detection. The show vsf output clearly shows Split Detection Method : mgmt, which means the stack is using the management interface as the VSF split-detection method. HPE Aruba Networking AOS-CX VSF documentation states that VSF split detection provides a mechanism for stack fragments to discover each other if a stack split occurs. Once fragments are discovered, the fragment with the primary member remains active, while the other fragment becomes inactive and its non-VSF interfaces are brought down to avoid duplicate MAC or IP addresses and reduce network disruption. The same guide states that the 6200 and 6300 switch series support split detection through the management interface and that the CLI command to enable it is vsf split-detect mgmt. Option A is incorrect because the output does not show peer-switch-based detection. Option B is incorrect because “Status: No Split” is the current state, not the detection method. Option D is incorrect because a ring changing to a chain is a topology change, but the configured integrity method shown is management-based split detection. ( arubanetworking.hpe.com )