Free Practice Questions for Huawei H12-893_V1.0 Exam

BGP EVPN (Ethernet VPN) extends BGP to provide control plane functionality for VXLAN overlays, including in Huawei’s data center networks. EVPN defines several route types to advertise different types of information:

Type 1:Auto-discovery routes for EVPN instances.

Type 2:MAC/IP Advertisement routes for host reachability.

Type 3:Inclusive Multicast Ethernet Tag routes for multicast traffic.

Type 4:Ethernet Segment routes for multi-homing.

Type 5:IP Prefix routes for advertising host IP routes and external network routes, enabling inter-subnet and external connectivity.

The question specifies routes used to advertise "host IP routes and external network routes," which aligns withType 5routes. These routes carry IP prefix information and a Layer 3 VNI, facilitating Layer 3 routing within the EVPN domain or to external networks. Thus, the answer is5.References:Huawei HCIP-Data Center Network Training – BGP EVPN Routes; CloudFabric EVPN Configuration Guide.

iMaster NCE-FabricInsight uses telemetry for performance metric collection, offering advanced monitoring in Huawei’s CloudFabric Solution. Let’s evaluate each option:

A. Efficient transmission:This is true. Telemetry uses streaming data (e.g., gRPC) to reduce overhead compared to traditional polling, enabling efficient transmission of metrics.TRUE.

B. Quasi-real-time data collection:This is true. Telemetry provides near-real-time data (e.g., sub-second updates), improving responsiveness over periodic SNMP polling.TRUE.

C. Intelligent data analysis and automated troubleshooting:This is false. While FabricInsight performs intelligent analysis, automated troubleshooting is a feature of the broader iMaster NCE platform, not specifically a telemetry advantage. Telemetry enables data collection, not the automation itself.FALSE.

D. One-off subscription and continuous data push:This is true. Telemetry operates on a subscription model where a one-time setup leads to continuous data push from devices, reducing manual intervention.TRUE.

Thus,A, B, and Dare advantages of telemetry-based performance metric collection.References:Huawei CloudFabric Data Center Network Solution – FabricInsight Telemetry; HCIP-Data Center Network Training – Performance Monitoring.

Huawei’s iMaster NCE-Fabric is an SDN controller for the CloudFabric data center network solution, providing network management and automation. The rollback feature allows administrators to revert configuration changes to previous states in case of errors. According to Huawei’s documentation, iMaster NCE-Fabric supportsfour rollback levels, enabling the system to store and restore up to four previous configuration versions. This ensures flexibility in undoing changes during network management tasks like upgrades or policy adjustments.

Options Analysis:

A. 3: Incorrect, as it underestimates the supported levels.

B. 4: Correct, aligning with Huawei’s specified rollback capability.

C. 2: Incorrect, as it is fewer than the supported levels.

D. 1: Incorrect, as it limits rollback to a single state, which is insufficient for complex management.

Thus, the answer isB (4).References:Huawei CloudFabric Data Center Network Solution – iMaster NCE-Fabric Features; HCIP-Data Center Network Training – SDN Controller Management.

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 healthassessment.TRUE.

All optionsA, B, C, and Dcan be identified by the health function of iMaster NCE-FabricInsight.References:Huawei CloudFabric Data Center Network Solution – FabricInsight Features; HCIP-Data Center Network Training – Network Health Monitoring.

On Huawei CloudEngine (CE) series switches, VXLAN tunnel monitoring and troubleshooting involve specific commands to diagnose issues such as tunnel Down status or failed dynamic establishment. Let’s evaluate each option:

A. Run the display vxlan statistics command to check the cause of the fault:This command provides statistics on VXLAN tunnel traffic, including packet drops, encapsulation/decapsulation counts, and errors. It helps identify issues like misconfiguration or network congestion, making it a valid troubleshooting tool.TRUE.

B. Run the display vxlan peer command to check the cause of the fault on the peer device of the tunnel:This command displays information about VXLAN peers, including their IP addresses, VNIs, and reachability status. Checking the peer device’s status can reveal connectivity or configuration mismatches, aiding fault diagnosis.TRUE.

C. Run the display vxlan troubleshooting command to check the causes of at most the latest five failures to dynamically establish a VXLAN tunnel:This command logs and displays troubleshooting details, including the latest five failure reasons for dynamic tunnel setup (e.g., BGP EVPN issues or reachability problems). This is a standard feature on Huawei CE switches.TRUE.

D. Run the display vxlan troubleshooting command to check at most the latest five reasons why a VXLAN tunnel goes Down:This command also tracks reasons for tunnel Down events (e.g., underlay failure, peer unreachability), limited to the latest five incidents. This is consistent with Huawei’s troubleshooting capabilities.TRUE.

All optionsA, B, C, and Dare true, as they represent valid commands and approaches to troubleshoot VXLAN tunnel issues on Huawei CE switches.References:Huawei CloudEngine Series Switch Command Reference – VXLAN Commands; HCIP-Data Center Network Training – Troubleshooting VXLAN.

In Huawei’s CloudFabric Solution,SecoManager(Security Manager) andiMaster NCE-Fabric(Network Controller) are components of the SDN ecosystem. SecoManager handles security policy management, while iMaster NCE-Fabric manages network orchestration.

Deployment:These components can be deployed independently but are designed to integrate seamlessly. Huawei’s architecture supports automated interconnection after installation, leveraging northbound/southbound APIs or pre-configured integration workflows.

Interconnection:Manual interconnection is not required post-installation; the system automates the process once both are deployed and configured within the same management domain (e.g., via IP addressing and authentication).

The statement isFALSE (B)because interconnection is automated, not manual.References:Huawei CloudFabric Data Center Network Solution – Component Integration; HCIP-Data Center Network Training – SDN Deployment.

In Huawei’s CloudFabric Solution, the iMaster NCE-Fabric controller manages the network in computing scenarios (e.g., virtualized environments). Controller interconnection with external systems can be mandatory or optional depending on functionality. Let’s evaluate each option:

A. Interconnection with FabricInsight:This is optional. FabricInsight is an analytics and assurance tool that enhances visibility and troubleshooting but is not required for basiccontroller operations in the computing scenario.OPTIONAL.

B. Interconnection with the authentication server:This is mandatory. Authentication servers (e.g., RADIUS, TACACS+) are essential for securing access to the controller and managed devices, a core requirement in computing scenarios.NOT OPTIONAL.

C. Interconnection with eSight:This is optional. eSight is a network management platform that provides additional monitoring and management capabilities, but it is not necessary for core controller functionality.OPTIONAL.

D. Interconnection with the VMM (Virtual Machine Manager):This is mandatory. Interconnection with a VMM (e.g., FusionCompute, OpenStack) is required to manage virtualized computing resources and orchestrate network services in the computing scenario.NOT OPTIONAL.

Thus,A (Interconnection with FabricInsight) and C (Interconnection with eSight)are optional services for controller interconnection.References:Huawei CloudFabric Data Center Network Solution – Controller Integration; HCIP-Data Center Network Training – Computing Scenario.

Multi-Chassis Link Aggregation Group (M-LAG) is a high-availability technology on Huawei CloudEngine (CE) series switches, where two switches appear as a single logical device to downstream devices. The peer-link between the M-LAG peers synchronizes critical information to ensure seamless failover if one device fails. Let’s evaluate the entries:

A. MAC Address Entries:MAC address tables map device MACs to ports. In M-LAG, synchronizing MAC entries ensures that both switches know the location of connected devices. If one switch fails, the surviving switch can forward Layer 2 traffic without relearning MAC addresses, preventing disruptions.Required.

B. Routing Entries:Routing entries (e.g., OSPF or BGP routes) are maintained at Layer 3 and typically synchronized via routing protocols, not M-LAG peer-link packets. M-LAG operates at Layer 2, and while Layer 3 can be overlaid (e.g., with VXLAN), routing table synchronization is not a standard M-LAG requirement.Not Required.

C. IGMP Entries:IGMP (Internet Group Management Protocol) entries track multicast group memberships. While useful for multicast traffic, they are not critical for basic unicast traffic forwarding in M-LAG failover scenarios. Huawei documentation indicates IGMP synchronization is optional and context-specific, not mandatory for general traffic continuity.Not Required.

D. ARP Entries:ARP (Address Resolution Protocol) entries map IP addresses to MAC addresses, crucial for Layer 2/Layer 3 communication. Synchronizing ARP entries ensures the surviving switch can resolve IP-to-MAC mappings post-failover, avoiding ARP flooding or traffic loss.Required.

Thus,A (MAC address entries) and D (ARP entries)are essential for M-LAG synchronization to maintain traffic forwarding during failover, per Huawei CE switch M-LAG design.References:Huawei CloudEngine Series Switch Configuration Guide – M-LAG Section; HCIP-Data Center Network Training – High Availability Technologies.