The question involves a customer experiencing performance degradation due to periodic overutilization of ToR-1 uplinks to legacy Core-1 and Core-2 switches. The proposed solution is to migrate to CX 6400 series switches, and the task is to identify which aspects of the CX 6400 platform address the issue while adhering to HPE Aruba Networking best practices.
* Analysis of Options:
* Option A:Incorrect. The CX 6400 does not support "multi-region design" as a feature for active forwarding pathways.
* Option B:Correct. Virtual Switching Framework (VSF) on the CX 6400 allows multiple active forwarding pathways by creating a single logical switch from multiple physical switches, eliminating the need for STP in the core and reducing uplink congestion.
* Option C:Incorrect. Backplane stacking does not directly enable ESXi hosts to load balance using active LACP; this is unrelated to uplink utilization.
* Option D:Correct. Multi-Chassis Link Aggregation (MC-LAG) allows Core-1 and Core-2 to form a single logical 802.3ad (LACP) device, enabling active-active uplinks from ToR-1 and load balancing traffic to prevent overutilization.
* Why B and D are Correct:The performance degradation is caused by uplink overutilization, likely due to STP blocking redundant paths or inefficient load balancing. The CX 6400's VSF capability combines multiple switches into a single logical device, allowing all uplinks from ToR-1 to be active without relying on STP, which often blocks redundant paths. MC-LAG further enhances this by presenting Core-1 and Core-2 as a single LACP system, enabling ToR-1 to use all uplinks actively via LACP load balancing. These features align with HPE Aruba Networking best practices for high-availability and performance in campus core deployments.
* Relevance to Certification Objectives:
* Network Resiliency and Virtualization (8%):Designing and troubleshooting VSF and MC- LAG for resiliency and redundancy.
* Performance Optimization (6%):Analyzing and remediating uplink utilization issues.
* Connectivity (9%):Applying advanced networking architectures like VSF and MC-LAG.
References:
HPE Aruba Networking AOS-CX Configuration Guide: VSF and MC-LAG Configuration, detailing active forwarding and load balancing.
HPE7-A06Study Guide: Covers core switch resiliency and performance optimization.
HPE Aruba Networking Technical Documentation: CX 6400 Series Deployment Best Practices.

The goal is to configure OSPF on a router so that it advertisesonlya 10.1.0.0/16 summary route for the specific SVIs (VLAN 11, 12, 13, assumed to be within the 10.1.x.x range) to its OSPF neighborswithin the same area (Area 0).
* OSPF Intra-Area Behavior:A fundamental principle of OSPF (link-state protocols) is that all routers within the same area must have an identical Link State Database (LSDB) for that area. This means all routers learn about all the specific networks (Type-1 Router LSAs, Type-2 Network LSAs) within their area. OSPFv2 doesnotsupport summarizing routes in a way that hides specific network LSAs from other routerswithin the same area. Summarization occurs only at area boundaries (by ABRs using Type-
3 Summary LSAs via the area range command) or for external routes redistributed into OSPF (by ASBRs using Type-5 External LSAs via the summary-address command).
* Analysis of Options:
* A) area 0 range 10.1.0.0/16:This command is used on an Area Border Router (ABR) to summarize routes originatingfromArea 0 when advertising theminto another area(e.g., the backbone). It does not affect LSA floodingwithinArea 0. It also includes redistribute connected, which is unrelated here.
* B) summary-address 10.1.0.0/16:This command is used on an Autonomous System Boundary Router (ASBR) to summarizeexternalroutes being redistributed into OSPF. It is not used for summarizing internal OSPF routes like SVIs defined within an OSPF area.
* C) & D) summary-address 10.1.0.0/16:Same issue as B; incorrect command for summarizing internal OSPF routes.
* E) area 0 range 10.1.0.0/16:Similar to A, this uses the area range command. It correctly shows the SVIs configured for OSPF Area 0 first. However, like A, this command performs inter-area summarization on an ABR and does not suppress the specific LSAswithinArea 0.
* Conclusion:The question asks for something that OSPFv2 cannot do: advertiseonlya summary route within the same area while suppressing specifics. Therefore, none of the configurations will achieve the exactstated outcome. However, if the question is flawed and intends to ask which configuration uses the correct command structure for summarizinginternalOSPF routes (even if only effective between areas), then the area range command is the relevant one. Both A and E use this command. Option E is slightly better structured as it shows the interfaces being added to OSPF Area 0 first. Assuming this is the intended direction despite the impossibility of the specific request, E is the most plausible choice among the given options.
References:RFC 2328 (OSPFv2), OSPF Configuration Guides for AOS-CX (explaining area range for ABRs and summary-address for ASBRs). This relates to the "Routing" (16%) objective.

Explanation:

The question requires matching the default BGP keepalive and hold-down timers on AOS-CX switches to their respective values.
* Analysis of Options:
* Keepalive Timer:The keepalive timer determines how often BGP keepalive messages are sent to maintain a session. The default value on AOS-CX switches is 60 seconds.
* Hold-down Timer:The hold-down timer specifies the maximum time a BGP session can remain active without receiving a keepalive or updatemessage before it is considered down. The default value on AOS-CX switches is 180 seconds.
* Why This Mapping is Correct:Per BGP standards (RFC 4271) and HPE Aruba Networking AOS-CX documentation, the default BGP keepalive timer is 60 seconds, and the hold-down timer is 180 seconds (three times the keepalive interval). These timers ensure BGP sessions remain stable while allowing timely detection of peer failures. The AOS-CX implementation adheres to these defaults unless explicitly configured otherwise.
* Relevance to Certification Objectives:
* Routing (16%):Involves designing and troubleshooting BGP routing topologies, including timer configurations.
* Troubleshooting (10%):Includes diagnosing BGP session issues related to timers.
References:
HPE Aruba Networking AOS-CX Configuration Guide: BGP Configuration, detailing default timer values.
HPE7-A06Study Guide: Covers BGP session management and timers.
RFC 4271: A Border Gateway Protocol 4 (BGP-4), specifying default keepalive and hold-down timers.

The question involves a customer deploying PoE-powered IoT security devices (e.g., door locks) that must remain active during an AOS-CX switch software upgrade. The task is to identify a valid solution.
* Analysis of Options:
* Option A:Incorrect. A VSX pair provides redundancy but does not guarantee PoE continuity during a single switch's upgrade.
* Option B:Incorrect. quick-poe reduces PoE startup time but does not ensure power during upgrades.
* Option C:Correct. power-over-ethernet always-on ensures PoE remains active during software upgrades, meeting the requirement.
* Option D:Incorrect. PoE priority adjusts power allocation but does not guarantee continuity during upgrades.
* Why Option C is Correct:The power-over-ethernet always-on feature on AOS-CX switches ensures that PoE power delivery continues uninterrupted during software upgrades or reboots, critical for devices like IoT security door locks that require constant power. This feature prevents power cycling on PoE ports, maintaining device operation. For example, enabling it on relevant ports (e.g., interface 1/1/1 power-over-ethernet always-on) ensures compliance with the customer's requirement, as per HPE Aruba Networking's PoE high-availability guidelines.
* Relevance to Certification Objectives:
* Connectivity (9%):Configuring PoE for critical device deployment.
* Network Resiliency and Virtualization (8%):Ensuring device uptime during maintenance.
* Troubleshooting (10%):Resolving PoE continuity issues.
References:
HPE Aruba Networking AOS-CX Configuration Guide: PoE Always-On Feature.
HPE7-A06Study Guide: Covers PoE configuration for high-availability devices.
HPE Aruba Networking Technical Documentation: PoE Best Practices for IoT.