Verified & Latest H12-893_V1.0 Dump Q&As with Correct Answers [Q11-Q32]

Verified & Latest H12-893_V1.0 Dump Q&As with Correct Answers

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NEW QUESTION # 11
"1-3-5" troubleshooting of the CloudFabric intelligent O&M solution can detect, locate, and rectify faults from multiple dimensions. Which of the following are not dimensions supported by this function? (Select All that Apply)

• A. Application
• B. Service
• C. Configuration
• D. Protocol
• E. Device

Answer: A

Explanation:
Huawei's CloudFabric intelligent O&M solution, leveraging iMaster NCE-Fabric and FabricInsight, uses the "1-3-5" principle (detect within 1 minute, locate within 3 minutes, rectify within 5 minutes) to handle faults. This approach analyzes faults across multiple dimensions. Let's evaluate each option:
A . Device: This is supported. The solution monitors device-level metrics (e.g., CPU, memory) to detect and locate faults. SUPPORTED.
B . Protocol: This is supported. Protocol issues (e.g., OSPF conflicts, BGP errors) are analyzed for fault detection and resolution. SUPPORTED.
C . Service: This is supported. Service-level faults (e.g., tenant connectivity, VPC issues) are tracked and addressed. SUPPORTED.
D . Application: This is not supported. The "1-3-5" troubleshooting focuses on network infrastructure (devices, protocols, services, configurations), not application-layer issues, which are outside its scope. NOT SUPPORTED.
E . Configuration: This is supported. Configuration errors (e.g., mismatched VNIs) are detected and rectified as part of the process. SUPPORTED.
Thus, D (Application) is not a dimension supported by the "1-3-5" troubleshooting function.

NEW QUESTION # 12
In Huawei CloudFabric Solution, OSPF or BGP can be used on the underlay network of a DC.

• A. TRUE
• B. FALSE

Answer: A

Explanation:
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 is TRUE (A).

NEW QUESTION # 13
In the spine-leaf DCN architecture, the border leaf node and service leaf node can be deployed on the same device.

• A. TRUE
• B. FALSE

Answer: A

Explanation:
In Huawei's spine-leaf data center network (DCN) architecture, the topology consists of spine nodes (core) and leaf nodes (access/aggregation). Leaf nodes can serve different roles:
Border Leaf Node: Connects the DCN to external networks or other domains, handling Layer 3 routing.
Service Leaf Node: Connects to internal services (e.g., servers, VMs), often handling Layer 2/Layer 3 traffic.
In practice, a single physical device can be configured to perform both roles (border and service) if it has the necessary interfaces and routing capabilities. Huawei's CloudFabric documentation supports this flexibility, allowing a leaf switch to act as both a border and service node based on configuration (e.g., using VRFs or VXLAN gateways). This reduces hardware costs and simplifies deployment in smaller DCNs.
The statement is TRUE (A) because the border leaf and service leaf roles can be deployed on the same device in a spine-leaf architecture.

NEW QUESTION # 14
Both M-LAG and stacking technologies can overcome the disadvantages of traditional DCNs. However, M-LAG is a better choice to ensure 24/7 service continuity.

• A. TRUE
• B. FALSE

Answer: A

Explanation:
Traditional data center networks (DCNs) often suffer from single points of failure, limited scalability, and traffic bottlenecks. Both M-LAG and stacking address these issues, but their suitability for 24/7 service continuity differs.
M-LAG Benefits: M-LAG (Multi-Chassis Link Aggregation) on Huawei CE switches allows two devices to act as a single logical switch, providing active-active forwarding, high availability, and rapid failover (e.g., via peer-link synchronization). It supports non-stop service during device failures, making it ideal for 24/7 continuity.
Stacking Benefits: Stacking combines multiple switches into a single logical unit, sharing a control plane. While it improves scalability and simplifies management, a stack master failure can disrupt the entire stack unless redundancy is perfectly configured, potentially affecting service continuity.
Comparison: M-LAG's decentralized design and real-time synchronization offer better fault isolation and recovery compared to stacking, where a master switch failure impacts the stack. Huawei documentation highlights M-LAG's superiority for high-availability scenarios like 24/7 operations.
The statement is TRUE (A) because M-LAG is indeed a better choice than stacking for ensuring 24/7 service continuity due to its robust failover and redundancy features.

NEW QUESTION # 15
In network overlay, both endpoints of a VXLAN tunnel are physical switches.

• A. TRUE
• B. FALSE

Answer: B

Explanation:
In a network overlay, VXLAN (Virtual Extensible LAN) tunnels extend Layer 2 networks over a Layer 3 underlay, commonly implemented in Huawei's data center solutions. The endpoints of a VXLAN tunnel are VXLAN Tunnel Endpoints (VTEPs), which encapsulate and decapsulate traffic.
VTEP Roles: VTEPs can be physical switches (e.g., Huawei CloudEngine series), virtual switches (e.g., Open vSwitch on a hypervisor), or routers with VXLAN support. The endpoints are defined by their IP addresses, not their physical nature.
Deployment Flexibility: In modern data centers, VXLAN tunnels often connect physical switches to virtualized environments where VTEPs reside on hypervisors or servers hosting VMs. For example, a VM's vNIC might connect to a virtual switch (VTEP) that tunnels to a physical switch VTEP. Thus, both endpoints are not always physical switches; one or both can be virtual.
The statement is FALSE (B) because both endpoints of a VXLAN tunnel are not necessarily physical switches; they can include virtual VTEPs in hypervisors or other devices.

NEW QUESTION # 16
Which of the following are the application scenarios of Huawei CloudFabric Solution? (Select All that Apply)

• A. OpenFlow network
• B. Container network
• C. Computing
• D. Hosting
• E. Cloud-network integration

Answer: B,D,E

NEW QUESTION # 17
Which of the following statements is false about the routing design for the underlay network during DCN deployment?

• A. When EBGP is used on the underlay network, each group of active-active leaf nodes is deployed in an AS.
• B. Compared with OSPF, EBGP involves fewer calculations and offers better scalability.
• C. When OSPF is used on the underlay network, only single-area OSPF can be deployed.
• D. OSPF is recommended for small and midsize DCNs, and EBGP is recommended for large and midsize networks.

Answer: C

Explanation:
The underlay network in Huawei's DCNs (e.g., CloudFabric) uses routing protocols like OSPF or BGP. Let's evaluate each statement:
A . OSPF is recommended for small and midsize DCNs, and EBGP is recommended for large and midsize networks: This is true. OSPF suits smaller networks (<300 switches), while EBGP is better for large networks (>300 switches) due to scalability. TRUE.
B . When OSPF is used on the underlay network, only single-area OSPF can be deployed: This is false. Multi-area OSPF can be deployed to manage larger networks, reducing routing table size and improving stability, a common practice in Huawei DCNs. FALSE.
C . Compared with OSPF, EBGP involves fewer calculations and offers better scalability: This is true. EBGP's path-vector nature requires fewer computational resources than OSPF's link-state calculations and scales better with large topologies. TRUE.
D . When EBGP is used on the underlay network, each group of active-active leaf nodes is deployed in an AS: This is true. In EBGP designs, active-active leaf nodes (e.g., M-LAG) are typically in the same Autonomous System (AS) to simplify routing, using iBGP or route reflectors. TRUE.
Thus, B is the false statement because multi-area OSPF is supported, not just single-area.

NEW QUESTION # 18
In ZTP networking, which of the following addresses can be delivered by a DHCP server? (Select All that Apply)

• A. SFTP server address
• B. Default gateway address
• C. DNS server address
• D. Temporary management IP address

Answer: B,C,D

Explanation:
Zero Touch Provisioning (ZTP) in Huawei's CloudFabric automates device setup using DHCP. Let's evaluate each option:
A . Default gateway address: This is true. DHCP can deliver the default gateway address to configure routing for the device. TRUE.
B . SFTP server address: This is false. SFTP server addresses are not standard DHCP options; they may be configured manually or via other protocols (e.g., TFTP for boot files). FALSE.
C . DNS server address: This is true. DHCP can provide DNS server addresses (Option 6) for name resolution during ZTP. TRUE.
D . Temporary management IP address: This is true. DHCP assigns temporary IPs (e.g., Option 50) for management during initial provisioning in ZTP. TRUE.
Thus, A, C, and D can be delivered by a DHCP server in ZTP.

NEW QUESTION # 19
Which of the following technologies are Layer 4 load balancing technologies? (Select All that Apply)

• A. LVS
• B. Nginx
• C. PPP
• D. HAProxy

Answer: A,B,D

Explanation:
Layer 4 load balancing operates at the transport layer (OSI Layer 4), using TCP/UDP protocols to distribute traffic based on information like IP addresses and port numbers, without inspecting the application-layer content (Layer 7). Let's evaluate each option:
A . Nginx: Nginx is a versatile web server and reverse proxy that supports both Layer 4 and Layer 7 load balancing. In its Layer 4 mode (e.g., with the stream module), it balances TCP/UDP traffic, making it a Layer 4 load balancing technology. This is widely used in Huawei's CloudFabric DCN solutions for traffic distribution. TRUE.
B . PPP (Point-to-Point Protocol): PPP is a Layer 2 protocol used for establishing direct connections between two nodes, typically in WAN scenarios (e.g., dial-up or VPNs). It does not perform load balancing at Layer 4 or any layer, as it's a point-to-point encapsulation protocol. FALSE.
C . LVS (Linux Virtual Server): LVS is a high-performance, open-source load balancing solution integrated into the Linux kernel. It operates at Layer 4, using techniques like NAT, IP tunneling, or direct routing to distribute TCP/UDP traffic across backend servers. It's a core Layer 4 technology in enterprise DCNs. TRUE.
D . HAProxy: HAProxy is a high-availability load balancer that supports both Layer 4 (TCP mode) and Layer 7 (HTTP mode). In TCP mode, it balances traffic based on Layer 4 attributes, making it a Layer 4 load balancing technology. It's commonly deployed in Huawei DCN environments. TRUE.
Thus, A (Nginx), C (LVS), and D (HAProxy) are Layer 4 load balancing technologies. PPP is not.

NEW QUESTION # 20
Which of the following statements is false about centralized gateway deployment using BGP EVPN?

• A. When configuring a VTEP, you need to create a Layer 2 BD and bind a VNI to the Layer 2 BD.
• B. When BGP EVPN is used to dynamically establish a VXLAN tunnel, the local and remote VTEPs first establish a BGP EVPN peer relationship and then exchange BGP EVPN routes to transmit VNI and VTEP IP address information. A VXLAN tunnel is then dynamically established between them.
• C. When configuring a VTEP, you need to create an EVPN Instance in the Layer 2 BD and configure an RD for the local EVPN instance. You do not need to configure an RT.
• D. A VXLAN tunnel is identified by a pair of VTEP IP addresses and can be established if the local and remote VTEP IP addresses are reachable to each other at Layer 3.

Answer: C

Explanation:
Centralized gateway deployment using BGP EVPN in Huawei's data center networks (e.g., CloudFabric) involves a gateway handling Layer 3 routing for VXLAN overlays. Let's evaluate each statement:
A . When configuring a VTEP, you need to create a Layer 2 BD and bind a VNI to the Layer 2 BD: A Bridge Domain (BD) is a Layer 2 broadcast domain in VXLAN, and a Virtual Network Identifier (VNI) is bound to it to segment traffic. This is a standard step when configuring a VXLAN Tunnel Endpoint (VTEP) to map the overlay network. TRUE.
B . A VXLAN tunnel is identified by a pair of VTEP IP addresses and can be established if the local and remote VTEP IP addresses are reachable to each other at Layer 3: VXLAN tunnels are established between VTEPs using their IP addresses as endpoints. Layer 3 reachability (e.g., via underlay routing) is required for tunnel establishment. TRUE.
C . When BGP EVPN is used to dynamically establish a VXLAN tunnel, the local and remote VTEPs first establish a BGP EVPN peer relationship and then exchange BGP EVPN routes to transmit VNI and VTEP IP address information. A VXLAN tunnel is then dynamically established between them: In BGP EVPN, VTEPs establish a BGP peer relationship, exchange routes (e.g., Type 2 for MAC/IP or Type 3 for multicast), and share VNI and VTEP IP details, enabling dynamic tunnel setup. TRUE.
D . When configuring a VTEP, you need to create an EVPN Instance in the Layer 2 BD and configure an RD for the local EVPN instance. You do not need to configure an RT: An EVPN Instance (EVI) is created within a BD, and a Route Distinguisher (RD) is configured to make routes unique. However, Route Targets (RTs) are also required to control route import/export between EVPN peers, ensuring proper VNI and route distribution. Stating that RT configuration is not needed is incorrect, as RTs are essential for BGP EVPN operation. FALSE.
Thus, D is the false statement because RT configuration is necessary in centralized gateway deployment with BGP EVPN.

NEW QUESTION # 21
In EVPN, Type 5 routes are used only by hosts on a VXLAN network to access external networks.

• A. TRUE
• B. FALSE

Answer: B

Explanation:
EVPN (Ethernet VPN) is a control plane technology used with VXLAN to provide Layer 2 and Layer 3 services in data center networks, including Huawei's implementations. EVPN routes are categorized into types, with Type 5 routes (IP Prefix routes) serving a specific purpose:
Type 5 Routes: These routes advertise IP prefixes and are used for inter-subnet routing, allowing communication between different VXLAN Virtual Network Identifiers (VNIs) or between VXLAN networks and external networks. They carry a Layer 3 VNI and IP prefix information, enabling routers or gateways to perform Layer 3 forwarding.
Usage Scope: Type 5 routes are not limited to hosts on a VXLAN network accessing external networks. They are also used by network devices (e.g., gateways, routers) within the EVPN domain to facilitate routing between subnets, including intra-VXLAN communication. For example, a centralized gateway or distributed gateway can use Type 5 routes to route traffic within the data center or to external networks, not just host-initiated access.
The statement is FALSE (B) because Type 5 routes are not exclusively for hosts on a VXLAN network to access external networks; they support broader Layer 3 routing functions across the EVPN domain.

NEW QUESTION # 22
Which of the following statements are false about heartbeat link faults in an M-LAG? (Select All that Apply)

• A. The fault that two master devices exist cannot be detected in the case of a peer-link fault.
• B. The fault protection mechanism is triggered.
• C. An alarm is triggered.
• D. Services are affected.

Answer: A,D

Explanation:
In Huawei's M-LAG (Multi-Chassis Link Aggregation), the heartbeat link (or peer-link) ensures communication between member devices. A fault in this link can impact M-LAG operation. Let's evaluate each statement:
A . The fault that two master devices exist cannot be detected in the case of a peer-link fault: This is false. A peer-link fault can be detected, and mechanisms like dual-master detection (e.g., via Inter-Chassis Communication Link or ICC) can identify if both devices assume master roles, triggering corrective actions. FALSE.
B . An alarm is triggered: This is true. A peer-link fault generates an alarm to notify administrators, as it's a critical failure in M-LAG operation, per Huawei's fault management system. TRUE.
C . The fault protection mechanism is triggered: This is true. Huawei M-LAG includes protection mechanisms (e.g., failover to backup links or shutdown of conflicting interfaces) to mitigate peer-link faults and maintain service continuity. TRUE.
D . Services are affected: This is false. With proper configuration (e.g., redundant links or fast failover), services should not be affected by a peer-link fault, as M-LAG is designed for high availability. Impact depends on redundancy, but the design goal is uninterrupted service. FALSE.
Thus, A and D are false statements because dual-master faults can be detected, and services are not necessarily affected with adequate redundancy.

NEW QUESTION # 23
V-STP prevents loops caused by incorrect configurations or connections in an M-LAG.

• A. TRUE
• B. FALSE

Answer: A

Explanation:
V-STP (Virtual Spanning Tree Protocol) is a Huawei-specific enhancement of the Spanning Tree Protocol (STP) designed to prevent Layer 2 loops in complex network topologies, including Multi-Chassis Link Aggregation (M-LAG) deployments on Huawei CloudEngine (CE) series switches.
M-LAG Overview: M-LAG allows two switches to appear as a single logical device, connecting to downstream devices via Link Aggregation Groups (LAGs). Without proper loop prevention, incorrect configurations (e.g., misconfigured ports) or physical connections (e.g., redundant links) can cause broadcast storms.
V-STP Role: V-STP extends STP to handle virtualized environments and M-LAG scenarios. It ensures that only one path is active in a loop-prone topology by blocking redundant links, preventing loops caused by misconfigurations or unintended connections. In M-LAG, V-STP coordinates with the peer-link to maintain a loop-free topology.
The statement is TRUE (A) because V-STP is designed to prevent loops in M-LAG deployments due to incorrect configurations or connections.

NEW QUESTION # 24
VXLAN is a network virtualization technology that uses MAC-in-UDP encapsulation. What is the destination port number used during UDP encapsulation?

• A. 0
• B. 1
• C. 2
• D. 3

Answer: A

Explanation:
VXLAN (Virtual Extensible LAN) is a network overlay technology that encapsulates Layer 2 Ethernet frames within UDP packets to extend Layer 2 networks over Layer 3 infrastructure, widely used in Huawei's CloudFabric data center solutions. The encapsulation process, often referred to as "MAC-in-UDP," involves wrapping the original Ethernet frame (including MAC addresses) inside a UDP packet.
UDP Encapsulation: The VXLAN header follows the UDP header, and the destination UDP port number identifies VXLAN traffic. The Internet Assigned Numbers Authority (IANA) has officially assigned UDP port 4789 as the default destination port for VXLAN.
Options Analysis:
A . 4787: This is not a standard VXLAN port and is not recognized by IANA or Huawei documentation.
B . 4789: This is the correct and widely adopted destination port for VXLAN, as specified in RFC 7348 and implemented in Huawei's VXLAN configurations.
C . 4790: This port is not associated with VXLAN and is unused in this context.
D . 4788: This is not a standard VXLAN port; it may be confused with other protocols but is not correct for VXLAN.
Thus, the destination port number used during UDP encapsulation in VXLAN is B (4789), aligning with Huawei's VXLAN implementation standards.

NEW QUESTION # 25
A vNIC can transmit data only in bit stream mode.

• A. TRUE
• B. FALSE

Answer: B

Explanation:
A vNIC (virtual Network Interface Card) is a software-emulated network interface used by virtual machines to communicate over a virtual or physical network. The statement's reference to "bit stream mode" is ambiguous but likely implies raw, low-level bit transmission without higher-layer processing.
vNIC Functionality: A vNIC operates at a higher abstraction level than physical NICs. It interfaces with the hypervisor's virtual switch (e.g., Open vSwitch in Huawei environments) and handles data in frames or packets (e.g., Ethernet frames), not just raw bit streams. The hypervisor or host NIC handles the physical bit stream transmission.
Data Transmission: vNICs support various modes depending on configuration (e.g., VirtIO, SR-IOV passthrough), transmitting structured data (frames/packets) rather than solely raw bits. Bit stream transmission is a physical-layer task, not the vNIC's sole mode.
Thus, the statement is FALSE (B) because a vNIC does not transmit data only in bit stream mode; it handles higher-level data structures, with bit-level transmission managed by underlying hardware.

NEW QUESTION # 26
Which of the following statements is false about M-LAG deployment?

• A. M-LAG networking can be classified into single-level M-LAG networking and multi-level M-LAG networking.
• B. Multi-level M-LAG must be configured based on V-STP.
• C. Multi-level M-LAG is mainly used to construct a large Layer 2 network in a DCN or directly connect DCNs at Layer 2.
• D. In multi-level M-LAG networking, you can manually configure the root bridge to prevent STP loops.

Answer: B

Explanation:
M-LAG (Multi-Chassis Link Aggregation) on Huawei CE series switches enhances high availability and load balancing by making two switches appear as one. Let's evaluate each statement:
A . Multi-level M-LAG is mainly used to construct a large Layer 2 network in a DCN or directly connect DCNs at Layer 2: This is true. Multi-level M-LAG extends the topology across multiple layers or data centers, facilitating large Layer 2 domains, a common use case in Huawei DCNs. TRUE.
B . In multi-level M-LAG networking, you can manually configure the root bridge to prevent STP loops: This is true. Manual configuration of the root bridge (e.g., using STP priority) is supported to optimize path selection and prevent loops, especially in complex M-LAG setups. TRUE.
C . Multi-level M-LAG must be configured based on V-STP: This is false. While V-STP can be used to prevent loops, M-LAG does not require V-STP specifically. Standard STP, RSTP, or MSTP can also be configured, depending on the network design. The requirement is loop prevention, not a mandatory V-STP dependency. FALSE.
D . M-LAG networking can be classified into single-level M-LAG networking and multi-level M-LAG networking: This is true. Single-level M-LAG connects two switches directly to devices, while multi-level M-LAG extends across additional layers or devices, a recognized classification in Huawei documentation. TRUE.
Thus, C is the false statement because multi-level M-LAG does not mandate V-STP configuration.

NEW QUESTION # 27
Which of the following is not an advantage of link aggregation on CE series switches?

• A. Improved forwarding performance of switches
• B. Improved reliability
• C. Increased bandwidth
• D. Load balancing supported

Answer: A

Explanation:
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.

NEW QUESTION # 28
Which of the following issues can be identified by the health function of iMaster NCE-FabricInsight? (Select All that Apply)

• A. Switch ARP entry threshold exceeded
• B. OSPF router ID conflict
• C. Routing loop on the network
• D. Switch CPU usage threshold exceeded

Answer: A,B,C,D

Explanation:
iMaster NCE-FabricInsight is Huawei's network assurance and analytics tool, integrated with CloudFabric, that uses telemetry to monitor network health. The health function identifies various issues. Let's evaluate each option:
A . Switch ARP entry threshold exceeded: This is true. FabricInsight monitors ARP table usage and can detect when the threshold is exceeded, indicating potential resource issues. TRUE.
B . OSPF router ID conflict: This is true. FabricInsight can detect OSPF router ID conflicts, which cause routing instability, through health checks on control plane data. TRUE.
C . Switch CPU usage threshold exceeded: This is true. FabricInsight tracks device performance metrics, including CPU usage, and flags thresholds to prevent performance degradation. TRUE.
D . Routing loop on the network: This is true. FabricInsight analyzes traffic patterns and routing tables to identify loops, leveraging telemetry data for network-wide health assessment. TRUE.
All options A, B, C, and D can be identified by the health function of iMaster NCE-FabricInsight.

NEW QUESTION # 29
Which of the following statements is false about VM service traffic in the computing scenario?

• A. Inter-VPC traffic must pass through the firewall.
• B. Traffic between vSwitches on virtual servers and server leaf nodes is VLAN encapsulated.
• C. Traffic inside a fabric is VXLAN encapsulated.
• D. Traffic between VAS devices and service leaf nodes is VLAN encapsulated.

Answer: A

Explanation:
In Huawei's CloudFabric computing scenario, VM service traffic involves virtualized environments with VXLAN overlays and traditional VLANs. Let's evaluate each statement:
A . Traffic inside a fabric is VXLAN encapsulated: This is true. Within a CloudFabric network, VXLAN encapsulation is used to transport traffic across the fabric, enabling overlay networking for VMs. TRUE.
B . Inter-VPC traffic must pass through the firewall: This is false. Inter-VPC (Virtual Private Cloud) traffic can be routed directly between VPCs using a gateway or router (e.g., with EVPN Type 5 routes) without necessarily passing through a firewall, depending on security policies. Firewalls are optional for inter-VPC traffic, not mandatory. FALSE.
C . Traffic between VAS devices and service leaf nodes is VLAN encapsulated: This is true. Value-Added Services (VAS) devices (e.g., load balancers) often connect to service leaf nodes using VLAN encapsulation, especially in traditional or hybrid deployments. TRUE.
D . Traffic between vSwitches on virtual servers and server leaf nodes is VLAN encapsulated: This is true. Traffic from virtual switches (vSwitches) on hypervisors to physical server leaf nodes typically uses VLAN encapsulation over the physical NICs, before VXLAN overlay if applicable. TRUE.
Thus, B is the false statement because inter-VPC traffic does not always require a firewall.

NEW QUESTION # 30
An enterprise builds a DC and deploys iMaster NCE-Fabric to automatically deliver network configurations. After the engineer manually deploys the underlay network and delivers overlay network configurations through iMaster NCE-Fabric, it is found that tenant hosts cannot access external networks. Which of the following is not a possible cause of this fault?

• A. No firewall security policy is configured when host traffic passes through the firewall.
• B. The MAC address of the NVE interface on the VXLAN network is not manually specified.
• C. No return route is configured on the PE.
• D. The engineer did not check whether the service loopback interface needs to be configured on the VXLAN network based on the switch model.

Answer: B

Explanation:
In Huawei's CloudFabric Solution, iMaster NCE-Fabric automates overlay network (e.g., VXLAN) configuration, while the underlay network is manually deployed. Tenant hosts failing to access external networks indicate a connectivity issue, likely at the overlay-underlay boundary or security layer. Let's evaluate each option as a possible cause:
A . No return route is configured on the PE: This is a possible cause. The Provider Edge (PE) device (e.g., border leaf or router) must have a return route to the tenant's VXLAN network for external access. Without it, traffic from external networks cannot reach the DC. POSSIBLE CAUSE.
B . The engineer did not check whether the service loopback interface needs to be configured on the VXLAN network based on the switch model: This is a possible cause. Some Huawei switch models (e.g., CE series) require a service loopback interface as the VTEP source IP. If omitted or misconfigured based on the model, external connectivity fails. POSSIBLE CAUSE.
C . No firewall security policy is configured when host traffic passes through the firewall: This is a possible cause. If a firewall is in the path (e.g., between tenant VPC and external network), a missing security policy (e.g., allowing outbound traffic) blocks access. POSSIBLE CAUSE.
D . The MAC address of the NVE interface on the VXLAN network is not manually specified: This is not a possible cause. The Network Virtualization Edge (NVE) interface in VXLAN does not require a manually specified MAC address; it uses the switch's system MAC or auto-generates one. iMaster NCE-Fabric typically handles this automatically, and manual specification is neither required nor a common fault point for external access issues. NOT A POSSIBLE CAUSE.
Thus, D is not a possible cause of the fault.

NEW QUESTION # 31
M-LAG configuration consistency check classifies device configurations into key configurations (Type 1) and common configurations (Type 2). This check can be performed in strict or loose mode based on the processing mode when key configurations are inconsistent. Which of the following statements is false about M-LAG configuration consistency check?

• A. If Type 2 configurations of the two M-LAG member devices are inconsistent, the M-LAG running status may be abnormal. Compared with Type 1 configuration problems, Type 2 configuration problems are more likely to be detected and have less impact on the network.
• B. If Type 2 configurations of the two M-LAG member devices are inconsistent, an alarm that indicates key and common configuration inconsistencies is generated.
• C. In loose mode, if Type 1 configurations of the two M-LAG member devices are inconsistent, the member interface on the M-LAG backup device is in Error-Down state and an alarm is generated, indicating that Type 1 configurations on the two devices are inconsistent.
• D. If Type 1 configurations of the two M-LAG member devices are inconsistent, certain problems may occur, such as loops and long-period packet loss when the status is normal.

Answer: B

Explanation:
To identify the false statement, we evaluate each option based on standard M-LAG documentation, such as Huawei's and Arista's guidelines, which are commonly referenced in HCIP-Data Center Network training.
Option A: In loose mode, if Type 1 configurations of the two M-LAG member devices are inconsistent, the member interface on the M-LAG backup device is in Error-Down state and an alarm is generated, indicating that Type 1 configurations on the two devices are inconsistent.
Evaluation: This statement is true. In loose mode, inconsistencies in Type 1 (key) configurations are still critical, as they can affect M-LAG operation. According to Huawei M-LAG Configuration Guide, when Type 1 configurations are inconsistent in loose mode, the system may place the member interface on the backup device into an Error-Down state and generate an alarm to alert administrators. This ensures that critical issues are flagged, even in loose mode, to prevent loops or packet loss.
Conclusion: True.
Option B: If Type 1 configurations of the two M-LAG member devices are inconsistent, certain problems may occur, such as loops and long-period packet loss when the status is normal.
Evaluation: This statement is true. Type 1 configurations are essential for M-LAG operation, and inconsistencies can lead to severe network issues. For example, mismatched LACP settings or VLAN mappings can create loops or cause packet loss, as noted in Arista M-LAG Documentation. These problems can persist even when the system appears normal, making consistency checks critical for troubleshooting and O&M.
Conclusion: True.
Option C: If Type 2 configurations of the two M-LAG member devices are inconsistent, the M-LAG running status may be abnormal. Compared with Type 1 configuration problems, Type 2 configuration problems are more likely to be detected and have less impact on the network.
Evaluation: This statement is true. Type 2 (common) configurations, such as QoS or STP settings, are less critical but can still affect network performance. According to Huawei M-LAG Best Practices, Type 2 inconsistencies are often detected during consistency checks but have a lower impact on M-LAG operation compared to Type 1 issues. They are also more likely to be flagged during monitoring, as they are less severe and easier to resolve.
Conclusion: True.
Option D: If Type 2 configurations of the two M-LAG member devices are inconsistent, an alarm that indicates key and common configuration inconsistencies is generated.
Evaluation: This statement is false. While Type 2 (common) configuration inconsistencies are detected during consistency checks, they do not typically trigger alarms, especially alarms that specifically indicate both key and common configuration inconsistencies. According to Huawei M-LAG Configuration Guide and Arista M-LAG Documentation, Type 2 inconsistencies may be logged or reported in system logs but are not severe enough to generate critical alarms unless they significantly impact network operation. Alarms are more commonly associated with Type 1 (key) configuration inconsistencies, as they pose a higher risk to M-LAG functionality.
Conclusion: False.

NEW QUESTION # 32
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