A customer is about to connect a new CX 6200 switch using ports 1/1/47 and 1/1/48 to an existing 5406R in a VSF configuration. The VSF is already configured with the following settings: trunk 1/A24, 2/A24 trk2 trk2 vlan tagged 100,200,300 vlan untagged 50 What needs to be configured on the new CX 6200 switch?
Answer(s): A
Why option A is the correct configurationThe existing 5406R VSF trunk is defined as a tagged trunk for VLANs 100, 200, 300 and an untagged native VLAN 50. On the CX 6200 you must create the same LAG (typically lag 27 ) that terminates on ports 1/1/47 and 1/1/48 and configure it as a trunk that:1. Allows all four VLANs (50, 100, 200, 300). 2. Sets the native VLAN to 50. In ArubaOS-CX the command vlan trunk native 50 implies an untagged native VLAN, matching the existing design. Option A uses exactly this syntax, so the new switch will present an identical trunk personality to the 5406R and will participate correctly in the VSF fabric.Why the other options are unsuitableOption B forces LACP static mode. The original VSF configuration does not rely on LACP; it uses a simple port-channel (trunk) relationship. Introducing LACP adds unnecessary complexity and may cause inter-operability issues if the peer device does not run LACP in static mode. Option C omits VLAN 50 from the allowed list. Since VLAN 50 is the native untagged VLAN on the 5406R, excluding it would drop all untagged traffic across the trunk, breaking the VSF link. Option D adds the qualifier untagged to the vlan trunk native command. ArubaOS-CX syntax does not require(and does not accept) the word “untagged” after the native VLAN ID; this would result in a syntax error or an undefined behavior.Therefore, only option A reproduces the exact trunk characteristics of the existing VSF, ensuring proper VLAN handling and seamless fabric integration.
Aruba CX 6200 Series Switches – Configuration Guide (VLAN Trunking) – https://h10350.www1.hp.com/docstore/c0x70d13/4a4a6d0e-3c9c-4c9b-9c5e-3e8c0e5a9f5d.pdf ArubaOS-CX Switching – Virtual Fabric (VSF) Configuration Guide – https://h10350.www1.hp.com/docstore/c0x70d13/5d0e6e6b-9c5f-4c4b-bc9a-1e0c8d5b5a1e.pdf
You are planning a 40Gbps link between two sites 35km apart. What type of cable will be required?
Answer(s): B
Correct choice – Single-mode fiber (SMF) • 40 Gbps Ethernet over 35 km can only be carried reliably by single-mode fiber, which supports transmission distances up to 10 km+ with standard 1550 nm transceivers and can reach 40 km with amplified or dispersion-shifted designs. • SMF’s low attenuation (~0.2 dB/km) and minimal modal dispersion allow a single wavelength to maintain the required eye-diagram quality at 40 Gbps over this span. • HPE (and most vendors) specify 40 Gbps QSFP+ or CFP modules that are qualified for up to 80 km on SMF, confirming suitability for a 35 km link.Why the other options are unsuitable • Multi-mode fiber (MMF) – even the best OM4/OM5 fibers are limited to ~150 m–300 m for 40 Gbps; beyond that the modal bandwidth and cruel bandwidth-budget make 35 km impossible. • UTP copper – copper cabling is defined for a maximum of 100 m at 10 Gbps (and far less at 40 Gbps); signal loss and electromagnetic interference prevent any reliable 40 Gbps 35 km run. • ZTP (Zero-Touch Provisioning) – this is a provisioning method, not a physical medium; it does not dictate the cable type needed for the distance and bandwidth requirements.
HPE 40 Gbps QSFP+ Optical Transceiver Datasheet – specifications for 80 km SMF reach: https://customer.hpe.com/servicebulletin/v2/getHelpDoc?docId=00002078Cisco Optical Networking product guide – 40 Gbps reach limits for single-mode vs multi-mode: https://www.cisco.com/c/en/us/td/docs/routers/access/1900/software/release/15-2_1_e/1521e-opt-optics.html
What describes the use of the Network Analytics Engine?
Answer(s): C
JustificationOption C: “automates root-cause analytics”The HPE Network Analytics Engine (NAE) continuously ingests telemetry, correlates events, and runs built-in analytics algorithms to pinpoint the underlying cause of network issues. It leverages machine-learning models and rule-based correlation to reduce the time required for manual troubleshooting, which matches the description of “automates root cause analytics”.Option A: “automatically creates tech support diagnostics in the event of a failure”NAE does not generate standalone diagnostics; it provides the analytical insight that can be used by support tools, but it does not directly produce a diagnostic file for the user.Option B: “schedules automated backups of the switch config”Config backup is handled by HPE OneView/Aruba Central or CLI scripts, not by NAE. NAE focuses on analytics, not configuration management.Option D: “creates support events for the HPE Aruba Networking Support Portal”Event creation for the portal is performed by HPE Support Connect or similar services. NAE contributes analytics data but does not autonomously push events to the portal.Conclusion Option C precisely captures the core function of the Network Analytics Engine: it automatically analyzes telemetry to identify the root cause of network problems, enabling faster issue resolution.
HPE Network Analytics Engine Overview – https://www.hpe.com/us/en/networking/network-analytics-engine.html Using Network Analytics Engine for Root-Cause Analysis – https://docs.hpe.com/en-us/aruba/network-analytics-engine/root-cause-analysis.html
Based on the example below:How is the VSF integrity verified if the VSF links between members 1 and 3 + 2 and 3 are disconnected?
How do you configure an in-band management IP address for the CX 4100i switch?
Justification – Best Option (B)In-band management requires a VLAN interface on CX-4100i switches. The command sequence is: interface vlan <vlan-id> → ip address <mgmt‑IP>/<mask> → no shutdown .Option B (“interface vlan 1 ip address 10.10.10.10/24 routing”) follows this syntax by binding the management IP to VLAN 1, which is the default in-band VLAN used for switch management traffic. Routing keyword – The “routing” keyword is accepted on HPE switches to enable IP routing on the VLAN interface, which is required for the switch to forward management traffic to the network gateway. Correct interface identifier – “vlan 1” clearly identifies the VLAN that will carry the management traffic, matching the design of in-band management.Why the other options are less suitableA: interface mgmtip address 10.10.10.10/24 routing – The mgmtip interface is a dedicated out-of-band management interface (e.g., on some HPE switches it is a separate physical or logical port). Using it for in-band management can cause conflicts and does not guarantee that traffic will be carried on the VLAN-based data plane. C: interface vlan 1 ip address 10.10.10.10/24 – While it references the correct VLAN, it omits the required“routing” keyword (or any “no shutdown” step). Without “routing” the interface may not participate in the switch’s IP routing table, preventing the management IP from reaching the network gateway. D: interface mgmtip address 10.10.10.10/24 – Similar to A, it targets the mgmtip interface, which is intended for out-of-band management only. It also lacks the VLAN context, so the IP would be bound to the wrong interface for in-band use.Conclusion – Option B correctly binds the management IP to a VLAN interface that participates in IP routing, ensuring proper in-band management of the CX 4100i switch.
HPE Aruba CX 4100 Switch Series – Configuration Guide – Managing the Switch with an IP address : https://support.hpe.com/hpesc/public/docDisplay?id=M000018123 HPE Aruba CX 4100 Switch Series – IP Interface Configuration : https://docs.hpe.com/en-us/aruba-cx-switches/6400-cx6448-switch-series/10.15/ 스위치 / configuration/ ip-interface.html (accessed 2025-11-02)
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