Pass the Huawei HCSP Presales H19-402_V1.0 Questions and answers with ExamsMirror

Huawei iMaster NCE-Fabric provides advanced capabilities for intelligent service orchestration and pre-deployment validation , especially in network virtualization and cloud-network integration scenarios.

The statement is correct because iMaster NCE-Fabric includes pre-event verification and simulation features , which allow administrators to:

Simulate service deployment before actual configuration is applied

Evaluate the impact on existing services to avoid disruptions

Estimate resource consumption , such as TCAM, bandwidth, and device capacity

These capabilities are part of Huawei’s intent-driven networking (IDN) approach, where the system validates whether the intended service can be safely and effectively deployed.

Additionally, these functions help:

Prevent configuration errors

Reduce service deployment risks

Improve network reliability and predictability

Enable efficient capacity planning

Huawei emphasizes closed-loop automation , where planning, simulation, deployment, and verification are integrated into a single workflow.

Therefore, the statement accurately reflects Huawei CloudFabric capabilities and is TRUE .

In Huawei networking, Eth-Trunk (link aggregation) can operate in two modes: manual mode and LACP mode . In manual mode , the Eth-Trunk is statically configured by the administrator, and member interfaces are manually added without using the Link Aggregation Control Protocol (LACP) .

In this mode, all member links that are up are considered active by default , and they simultaneously participate in traffic forwarding and load balancing . Traffic distribution is typically based on hash algorithms (e.g., source/destination MAC or IP), ensuring efficient utilization of available bandwidth.

Unlike LACP mode, manual mode does not perform dynamic negotiation or link state detection between devices. Therefore, it requires consistent configuration on both ends to avoid issues such as loops or traffic blackholing. However, it is simpler and can be useful in controlled environments.

In Huawei data center designs, especially in M-LAG scenarios , LACP is generally preferred for better reliability and fault detection. Still, the statement accurately describes manual mode behavior.

Therefore, the statement is TRUE .

In Huawei CloudFabric architecture, a PoD (Point of Delivery) or site is defined as an independent network fault domain under the management of the SDN controller (such as iMaster NCE-Fabric). This design is fundamental for large-scale data center deployments, ensuring clear fault isolation, simplified management, and scalable expansion.

Each PoD typically consists of one or more spine-leaf fabric architectures , which provide high-bandwidth, low-latency, and horizontally scalable connectivity. Within a PoD, all devices operate under a unified control and policy framework delivered by the controller. If a failure occurs within a PoD, it is contained and does not affect other PoDs, thereby improving overall network reliability.

Huawei recommends this modular design approach to support multi-data center deployments, disaster recovery, and service expansion. Multiple PoDs can be interconnected to form a larger cloud fabric, while still maintaining independent fault domains.

Therefore, the statement accurately reflects Huawei CloudFabric design principles and is TRUE.

In Huawei data center networking, M-LAG (Multi-Chassis Link Aggregation Group) is a critical technology used to provide active-active access, high availability, and link redundancy . It allows a downstream device (such as a server) to establish a single logical Eth-Trunk across two separate physical switches (DeviceA and DeviceB).

From the server’s perspective, both upstream switches appear as one logical device , which eliminates the need for protocols like STP and enables simultaneous forwarding on all active links . This significantly improves bandwidth utilization and avoids blocked links.

The key advantage highlighted in the statement is the improvement of reliability from card-level to device-level . In traditional single-device link aggregation, failures are limited to interface cards. However, with M-LAG, even if an entire switch (device-level failure) goes down, traffic continues to flow through the other active switch without interruption.

Huawei CloudFabric widely adopts M-LAG + VXLAN EVPN to ensure high reliability, fast convergence, and continuous service availability .

Therefore, the statement is TRUE .

In Huawei CloudFabric Solution, health check and intelligent O & M are performed across multiple key dimensions to ensure stable, secure, and efficient network operations. These dimensions provide a comprehensive view of the data center network’s health.

Capacity (A): Evaluates resource utilization such as bandwidth, device capacity, and scalability limits to prevent bottlenecks.

Status (B): Monitors the operational state of devices, links, and services (up/down, faults, alarms).

Connectivity (D): Verifies end-to-end network reachability, ensuring that services and tenants can communicate properly across the fabric.

Security policy (E): Checks correctness and consistency of policies such as ACLs, segmentation, and service chaining rules.

Performance (F): Measures latency, packet loss, throughput, and congestion, which are critical in modern workloads like AI and storage.

VM (C) is not considered a core health check dimension at the network level. It belongs more to the compute/virtualization domain rather than network O & M.

Huawei iMaster NCE-FabricInsight uses these dimensions to provide proactive fault detection, root cause analysis, and optimization recommendations , ensuring intelligent lifecycle management of the data center network.

In Huawei CloudFabric and VXLAN-based overlay networking, the overlay provides abstraction, flexibility, and scalability by decoupling logical services from the physical infrastructure. NVEs (Network Virtualization Edge nodes) can indeed be deployed on physical switches (such as leaf switches), which is a fundamental capability of hardware-based VXLAN fabrics. Additionally, overlay networks are designed to meet the needs of private cloud environments, offering high performance, simplified O & M, and enhanced security through network segmentation (e.g., VXLAN VNIs).

Overlay networks also support access for both virtual machines and physical servers, ensuring consistent connectivity regardless of workload type.

However, statement D is incorrect. In Huawei’s architecture, especially with BGP EVPN-based VXLAN, the control plane is distributed rather than relying on a controller to synchronously deliver flow tables. Devices dynamically learn and exchange forwarding information using EVPN. Even in SDN-based scenarios with iMaster NCE-Fabric, policy delivery is not strictly synchronous flow table pushing in the traditional sense (like OpenFlow).

Therefore, “controller delivers flow tables synchronously” is not a standard capability of Huawei overlay networks, making option D incorrect.

In Huawei routing principles, route selection follows a strict hierarchy. When multiple routing protocols advertise routes to the same destination, the system first compares the route preference (priority) , not the cost. The route with the lowest preference value (highest priority) is selected. Only within the same routing protocol are cost/metric values compared to determine the best route.

Option A is correct because only one optimal route is installed in the routing table at a time, based on protocol preference. Option B is also correct: direct routes are automatically generated for networks connected to local interfaces. Option C is valid as Huawei devices support route import (redistribution) between routing protocols, enabling flexible network design.

Option D is incorrect because it reverses the decision logic. It incorrectly states that cost is compared before priority, which contradicts Huawei’s routing selection process.

Therefore, the false statement is D .

In OpenStack Neutron, the core network abstraction models are Network, Subnet, and Port , which align with Huawei CloudFabric’s logical network design principles. A Network represents a Layer 2 broadcast domain, similar to a VXLAN segment (VNI) in Huawei data center fabrics. It provides tenant-level isolation and forms the foundation for overlay networking.

A Subnet defines the Layer 3 IP addressing scheme within a network, including CIDR blocks, gateway addresses, and DHCP configurations. This aligns with Huawei’s underlay/overlay separation, where IP addressing is critical for both service reachability and automation.

A Port is the connection point between a virtual machine (VM) and the virtual network, equivalent to a virtual NIC. It carries MAC/IP bindings and security policies, similar to endpoint definitions in EVPN-based fabrics.

The option vRouter is incorrect because Neutron uses the concept of a Router , not “vRouter,” and it is considered a higher-layer service component rather than a fundamental network model. Huawei documentation consistently emphasizes these three as the foundational constructs for virtualized network design.

In Huawei CloudFabric architecture, the underlay network is the physical IP fabric, while the overlay network is a logical network built on top of it using technologies like VXLAN and BGP EVPN .

Option A is false because the overlay network does not require bare optical fibers . It operates independently of the physical medium and can run over any IP-based underlay (Ethernet, optical, etc.). The overlay abstracts the physical infrastructure.

Option B is correct : the underlay network is transparent to endpoints (servers, firewalls, routers). These devices only interact with the overlay and are unaware of the underlying transport.

Option C is correct : the overlay has its own forwarding plane (VXLAN encapsulation) and control plane (BGP EVPN) , enabling scalable and automated network virtualization.

Option D is correct : the overlay is a logical network built over the underlay , providing tenant isolation and flexible service deployment.

Huawei best practices emphasize decoupling overlay from underlay , ensuring flexibility, scalability, and simplified operations.

Therefore, the correct answer is A .

Huawei iMaster NCE-Fabric ZTP (Zero Touch Provisioning) is designed to enable automated, fast, and error-free deployment of data center network devices, significantly reducing manual configuration efforts.

All listed options are valid characteristics:

Plug-and-play (A): Devices can automatically obtain configurations once powered on and connected to the network, requiring minimal manual intervention.

Visualized device onboarding (B): The controller provides a graphical interface to monitor onboarding progress, topology, and device status, improving deployment visibility.

Link verification (C): ZTP includes automatic cabling and link detection/verification , ensuring correct physical connections before service provisioning.

Batch device onboarding (D): Multiple devices can be onboarded simultaneously, enabling large-scale data center deployment with high efficiency.

Huawei emphasizes ZTP as a key capability in CloudFabric for:

Rapid service rollout

Reduced human error

Standardized deployment

Simplified O & M

This aligns with Huawei’s goal of achieving fully automated and intelligent data center network provisioning .

Therefore, the correct answers are A, B, C, and D .