AOS-CX supports two principal high-availability switching technologies: Virtual Switching Framework (VSF) and Virtual Switching Extension (VSX).

VSF combines multiple compatible switches into a single logical switching system with a unified management and control plane.

VSX establishes a redundant relationship between two supported switches while retaining independent control planes. It supports active-active forwarding and multi-chassis link aggregation.

Option C is correct because the CX 9300 Switch Series supports VSX. HPE includes the 9300 family within its official AOS-CX Virtual Switching Extension documentation.

Option D is also correct because the CX 5420 Switch Series supports VSX clustering. However, VSF is not supported on the CX 5420; the statement is valid specifically through its VSX alternative.

Option B is incorrect because CX 6000 switches do not support VSF stacking.

Option A is too broad. Although CX 6200F and 6200M models support VSF and may be combined within a compatible stack, HPE documents specific SKU restrictions. Certain CX 6200 models can stack only with designated compatible models.

Consequently, claiming unrestricted interoperability between all models in the series is technically inaccurate.

When specifying a resilient campus topology, the architect must verify platform compatibility, supported software releases, stack-member limits, interconnect requirements, and redundancy behavior.

Official HPE Reference: AOS-CX 10.15 Virtual Switching Extension Guide — 5420 and 9300 Switch Series; AOS-CX Virtual Switching Framework Guide — Interoperation and Model Restrictions.

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