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| Section | Objectives |
|---|---|
| Topic 1: Multicast and Traffic Optimization | - PIM-SM/SSM concepts (high-level) - IGMP snooping and multicast control |
| Topic 2: Automation and Programmability | - REST API and HTTPS interface usage - NETCONF/YANG and Python-based automation (conceptual) |
| Topic 3: Security and Access Control | - 802.1X authentication and NAC integration (ClearPass) - Role-based access control and segmentation |
| Topic 4: Network Troubleshooting and Operations | - Switch diagnostics and CLI-based troubleshooting - Performance optimization (MTU, QoS, congestion) |
| Topic 5: Routing and Multilayer Switching | - Inter-VLAN routing and L3 switching - OSPF fundamentals and advanced operations - BGP basics in campus environments |
| Topic 6: Aruba AOS-CX Switching Technologies | - Spanning Tree (RSTP/MSTP) operations - VSX, VSF, and MC-LAG architecture - VLANs, trunking, and link aggregation (LACP) |
| Topic 7: Campus Network Architecture | - Scalable enterprise network topology design - Hierarchical campus design (core, distribution, access layers) - Redundancy, high availability, and load balancing strategies |
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問題 #120
Which EAP methods arc supported when configuring The 802.1X supplicant feature on an AOS-CX switch?
(Selecttwo.)
答案：D,E
解題說明：
The question asks which EAP (Extensible Authentication Protocol) methods are supported when configuring the 802.1Xsupplicantfeature on an AOS-CX switch (i.e., the switch acting as the client authenticating to another device).
* AOS-CX 802.1X Supplicant:Allows the switch itself to authenticate using 802.1X.
* Supported EAP Methods:Switch implementations typically support a subset of common EAP methods for the supplicant role. Secure methods are preferred. AOS-CX documentation for the dot1x supplicant eap-method command typically lists supported types. Common secure methods found in documentation include EAP-TLS and EAP-PEAP (usually with MSCHAPv2). EAP-MD5 is often supported but insecure.
* Analysis of Options (Select Two):
* A. EAP-TLS: A secure, certificate-based method commonly supported by enterprise supplicants.
Likely supported.
* B. EAP-TTLS: Another secure tunneled method, but PEAP is sometimes more common in switch supplicants. Support needs verification in specific AOS-CX docs.
* C. EAP-MD5: Simple challenge-response, but insecure. Often supported for legacy reasons.
* D. EAP-PEAP: Secure tunneled method using server-side certificate and typically username
/password (MSCHAPv2) inside. Commonly supported.
* E. EAP-TEAP: A newer tunneled method, less likely to be supported than PEAP/TLS in switch supplicants.
* Conclusion:Based on typical enterprise requirements and likely AOS-CX capabilities documented for the supplicant feature, the secure methods EAP-TLS(A) and EAP-PEAP (D) are the most probable supported options among the choices.
References:AOS-CX Security Guide (802.1X Supplicant configuration, supported EAP methods). This relates to "Security" (10%) and "Authentication/Authorization" (9%).
問題 #121
You see the output unknown the first time you run the command, but the next time you see the following information displayed.
What are some things you could look at in the switch to troubleshoot the issue? (Choose two.)
答案：B,D
解題說明：
diag cable 1/1/X → Runs a diagnostic test on the cable connected to the port to check for faults.
diag cable-diagnostic 1/1/X → Performs a detailed cable diagnostic to identify impedance, shorts, or open circuits.
問題 #122
Exhibit.
The customer has VSX clusters intwo locations interconnected over an MC-LAG interface.
If active-gateway configuration uses the same virtual IP address and vMAC on each of the VSX nodes, what must you take into consideration0
答案：A
解題說明：
The scenario describes two separate VSX clusters interconnected via MC-LAG, where both clusters are configured to use theexact samevirtual IP address and virtual MAC address for their respective Active Gateway SVIs.
* Active Gateway Scope & Conflict:Active Gateway provides a highly available default gatewaywithina single VSX cluster (L2 domain). The vIP/vMAC combination should be unique within its L2 broadcast domain.
* Interconnecting Clusters with Same vIP/vMAC:When two VSX clusters using the identical Active Gateway vIP/vMAC are interconnected at Layer 2 (even via MC-LAG), this creates a situation where the same active L2 (vMAC) and L3 (vIP) address exists in multiple places within the extended broadcast domain.
* Consequences:This leads to MAC address conflicts and L3 ambiguity. ARP resolution becomes unreliable, potentially causing ARP tables to flap on connected devices. Traffic forwarding becomes unpredictable, as packets destined for the vIP/vMAC might be delivered to the "wrong" cluster. This unstable and unpredictable state is sometimes referred to as an asymmetric or "async" setup.
* Analysis of Options:
* A: ISL traffic might change, but it's a symptom, not the root problem.
* B: Multiple ARP replies would occur, contributing to the confusion.
* C: The configuration results in an "async setup," accurately describing the unstable state caused by duplicate active L2/L3 addresses across the interconnected L2 domain.
* D: Load-balancing happens within a cluster; this setup causes conflict, not predictable load balancing across clusters.
* Conclusion:Reusing the same Active Gateway vIP and vMAC across interconnected VSX clusters is not a valid design and leads to an unstable, asymmetric ("async") environment due to address duplication within the extended L2 domain. Option C best describes this problematic outcome.
References:Aruba VSX Design and Best Practices Guides (Active Gateway uniqueness, Interconnecting VSX clusters). This relates to "Network Resiliency and virtualization" (8%), "Routing" (16%), and
"Troubleshooting" (10%) objectives.
問題 #123
Which minimal configurations must becompleted for MSTP to work correctly? (Select two.)
答案：C,D
解題說明：
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.
問題 #124
Ever since a recent firewall change at your WAN/lnternet edge, the 8GP state in your VSX pair has not returned to Established. What should you check to restore BGP functionality at the site?
答案：C
解題說明：
The BGP state on a VSX pair is stuck (not 'Established') after a recent firewall change at the WAN/Internet edge, where the BGP peering likely occurs.
* BGP and Firewalls:BGP establishes sessions usingTCP port 179. Firewalls located between BGP peers must explicitly permit TCP port 179 traffic bidirectionally for the peering to establish and maintain. Firewall changes are a frequent cause of broken BGP sessions.
* Troubleshooting Steps After Firewall Change:The most logical first step is to verify that the firewall change did not inadvertently block TCP port 179 between the configured BGP neighbor IP addresses.
* Analysis of Options:
* A: Restarting routing service is disruptive and not the first step.
* B: Confirming that appropriate TCP ports (specifically 179) are still allowed through the firewall directly addresses the most probable cause related to the firewall change event.
* C: Restarting NAT service is likely irrelevant unless NAT is incorrectly configured for BGP peers.
* D: Confirming the peer AS is a basic configuration check but less likely related to thefirewall changeevent than port blocking.
* Conclusion:Given the problem occurred immediately following a firewall change, verifying that the firewall still permits TCP port 179 between the BGP peers is the most direct and likely troubleshooting step.
References:BGP protocol specifications (RFC 4271), Firewall management principles, Network troubleshooting methodology. This relates to "Routing" (16%), "Security" (10%), and "Troubleshooting" (10%) objectives.
問題 #125
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