In Huawei’s spine-leaf VXLAN fabric (e.g., CloudFabric), nodes have specific roles:

A. DCI leaf:Data Center Interconnect (DCI) leaf nodes connect different data centers, not internal computing resources.Incorrect.

B. Server leaf:Server leaf nodes connect computing resources (virtual servers via hypervisors, physical servers) to the VXLAN fabric, handling access traffic. This is the correct role for connecting servers.Correct.

C. Border leaf:Border leaf nodes connect the DCN to external networks, not internal computing resources.Incorrect.

D. Service leaf:Service leaf nodes connect to value-added services (e.g., firewalls), not directly to computing resources like servers.Incorrect.

Thus, the answer isB (Server leaf).References:Huawei CloudFabric Data Center Network Solution – Spine-Leaf Architecture; HCIP-Data Center Network Training – Node Roles.

Link aggregation, often implemented using Link Aggregation Control Protocol (LACP) on Huawei CloudEngine (CE) series switches, combines multiple physical links into a single logical link to enhance network performance and resilience. The primary advantages include:

Load Balancing Supported (B):Link aggregation distributes traffic across multiple links based on hashing algorithms (e.g., source/destination IP or MAC), improving load distribution and preventing any single link from becoming a bottleneck.

Increased Bandwidth (C):By aggregating multiple links (e.g., 1 Gbps ports into a 4 Gbps logical link), the total available bandwidth increases proportionally to the number of links.

Improved Reliability (D):If one link fails, traffic is automatically redistributed to the remaining links, ensuring continuous connectivity and high availability.

However,Improved Forwarding Performance of Switches (A)is not a direct advantage. Forwarding performance relates to the switch’s internal packet processing capabilities (e.g., ASIC performance, forwarding table size), which link aggregation does not inherently enhance. While it optimizes link utilization, it doesn’t improve the switch’s intrinsic forwarding rate or reduce latency at the hardware level. This aligns with Huawei’s CE series switch documentation, where link aggregation is described as enhancing bandwidth and reliability, not the switch’s core forwarding engine.References:Huawei CloudEngine Series Switch Configuration Guide – Link Aggregation Section.

In Huawei’s CloudFabric Solution, the underlay network provides the physical infrastructure for VXLAN overlays. Both OSPF (Open Shortest Path First) and BGP (Border Gateway Protocol) are supported routing protocols:

OSPF:Suitable for smaller to medium-sized DCNs, offering fast convergence and simplicity.

BGP:Preferred for large-scale DCNs, providing scalability and multi-tenancy support (e.g., EBGP for inter-AS or iBGP for intra-DC).

Huawei documentation confirms flexibility in choosing OSPF or BGP based on network size and requirements. The statement isTRUE (A).References:Huawei CloudFabric Data Center Network Solution – Underlay Protocols; HCIP-Data Center Network Training – Routing Options.

VXLAN (Virtual Extensible LAN) tunnels are used to encapsulate Layer 2 traffic over a Layer 3 network, a key component in Huawei’s CloudFabric data center solutions. Let’s evaluate each statement:

A. A VXLAN tunnel is identified by a pair of VTEPs:This is true. A VXLAN tunnel is identified by the pair of VXLAN Tunnel Endpoint (VTEP) IP addresses (local and remote), along with the VNI (VXLAN Network Identifier). This ensures unique tunnel identification.TRUE.

B. After a tunnel is established, if one end of the tunnel goes Down, the other end may not go Down:This is true. VXLAN tunnels are unidirectional, and the status of one end does not automatically affect the other unless the underlay network connectivity (e.g., Layer 3 reachability) is lost. The remote VTEP may remain operational if it can still encapsulate/decapsulate traffic.TRUE.

C. For a static tunnel, you need to manually configure the local and remote VNIs:This is true. In a static VXLAN tunnel, administrators must manually configure the VNI and VTEP IP addresses on both ends, as there is no dynamic control plane (e.g., BGP EVPN) to automate the process.TRUE.

D. Dynamic tunnels depend on EVPN Type 5 routes to transmit information:This is false. Dynamic VXLAN tunnels rely on BGP EVPN as the control plane, but Type 5 routes (IP Prefix routes) are specifically used for advertising host IP routes and external network routes, not for general tunnel establishment. Dynamic tunnel setup primarily uses Type 2 (MAC/IP Advertisement) and Type 3 (Multicast) routes to exchange VNI and VTEP information. Type 5 routes are relevant for Layer 3 routing, not the initial tunnel setup.FALSE.

Thus,Dis the false statement because dynamic tunnels depend on EVPN Type 2 and Type 3 routes, not Type 5, for initial establishment.References:Huawei CloudFabric Data Center Network Solution – VXLAN Configuration Guide; HCIP-Data Center Network Training – VXLAN Tunneling.

Huawei’s CloudFabric Solution supports various data center scenarios. Let’s evaluate each option:

A. Container network:This is true. CloudFabric supports containerized environments (e.g., Kubernetes) with VXLAN and SDN integration.TRUE.

B. OpenFlow network:This is false. CloudFabric primarily uses BGP-EVPN and proprietary protocols, not OpenFlow, which is more associated with other SDN platforms.FALSE.

C. Hosting:This is true. CloudFabric is suitable for hosting environments, providing multi-tenant network services.TRUE.

D. Cloud-network integration:This is true. It integrates with cloud platforms (e.g., OpenStack) for unified management.TRUE.

E. Computing:This is false. While it supports computing resources, “computing” is not a primary scenario; it’s an enabler (e.g., server connectivity).FALSE.

Thus,A, C, and Dare application scenarios.References:Huawei CloudFabric Data Center Network Solution – Use Cases; HCIP-Data Center Network Training – Application Scenarios.

FusionCompute is Huawei’s virtualization platform, part of the FusionSphere ecosystem, designed for managing virtualized resources in data centers. Its logical architecture consists of two primary modules:

VRM (Virtualization Resource Management):VRM is the management module responsible for centralized control, resource allocation, and monitoring of virtual machines, hosts, and clusters. It provides the user interface and orchestration capabilities for administrators to manage the virtualized environment.

CNA (Compute Node Agent):CNA runs on physical hosts and handles the execution of virtualization tasks, such as VM creation, resource scheduling, and communication with the underlying hypervisor (typically KVM in Huawei’s implementation). It acts as the compute node agent interfacing with the hardware.

Together, VRM and CNA form the core logical architecture of FusionCompute, with VRM managing the environment and CNA executing the compute tasks. The answer, per Huawei’s documentation, isVRM.References:Huawei FusionCompute Product Documentation – Architecture Overview; HCIP-Data Center Network Training – FusionCompute Section.

In Huawei’s spine-leaf DCN architecture, nodes have distinct roles:

A. Spine:The spine nodes form the backbone of the data center, providing high-speed IP forwarding between leaf nodes. They handle east-west traffic with non-blocking connectivity, making them the core backbone nodes.Correct.

B. DC1 leaf:This is not a standard node type; it may be a typo or misnomer. Leaf nodes connect to endpoints, not act as backbones.Incorrect.

C. Service leaf:Service leaf nodes connect to internal services (e.g., servers), not the backbone, focusing on access rather than high-speed forwarding.Incorrect.

D. Border leaf:Border leaf nodes connect to external networks, handling routing, not serving as the internal backbone.Incorrect.

Thus, the answer isA (Spine).References:Huawei CloudFabric Data Center Network Solution – Spine-Leaf Architecture; HCIP-Data Center Network Training – Node Roles.