The question asks for the minimal configurations required for Multiple Spanning Tree Protocol (MSTP) to work correctly on AOS-CX switches.
Analysis of Options:
Option A:Correct. The MSTP region name must be configured to define the MSTP region and ensure switches belong to the same region.
Option B:Incorrect. Bridge priority is optional and defaults to 32768; it’s not mandatory for MSTP functionality.
Option C:Correct. The MSTP revision number is required to ensure consistency across switches in the same region.
Option D:Incorrect. Enabling MSTP on interfaces is automatic for VLAN-enabled ports; explicit configuration is not mandatory.
Option E:Incorrect. Creating MSTP instances is optional and only needed for specific VLAN-to-instance mappings.
Why A and C are Correct:MSTP requires a consistent region configuration across all switches to function correctly. The minimal configuration includes:
MSTP region name:Defines the region (e.g., spanning-tree config-name REGION1) to group switches.
Revision number:Ensures region consistency (e.g., spanning-tree config-revision 1).
These settings ensure switches form a single MSTP region, allowing VLAN-to-instance mappings (default instance 0 if not specified) and loop prevention. Other settings, like bridge priority or explicit instance creation, are optional and not strictly required for basic MSTP operation.
Relevance to Certification Objectives:
Network Resiliency and Virtualization (8%):Designing and troubleshooting MSTP for redundancy and fault tolerance.
Switching (19%):Implementing Layer 2 technologies like MSTP for loop prevention.
[References:, HPE Aruba Networking AOS-CX Configuration Guide: MSTP Configuration, detailing region and revision requirements., HPE7-A06Study Guide: Covers MSTP setup and best practices., HPE Aruba Networking Technical Documentation: Spanning Tree Protocols for AOS-CX., ]
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