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Huawei H12-891_V1.0 Exam Syllabus Topics:

Section	Weight	Objectives
Network Automation	17%	- Automation Technologies 1. RESTful API 2. Ansible 3. Python Scripting 4. NETCONF/YANG - iMaster NCE 1. Intent-Driven Networking - NCE (Network Cloud Engine) 1. Deployment 2. Architecture
WAN Interconnection Network Planning and Deployment	8%	- MPLS VPN 1. Full-Mesh 2. Hub-Spoke - Inter-AS VPN 1. Option B 2. Option C 3. Option A - SD-WAN 1. Orchestrator 2. Architecture
Campus Network Planning and Deployment	23%	- Overlay Network (VXLAN) 1. VXLAN Gateway 2. BGP EVPN - Underlay Network 1. IP Address Planning 2. Physical Layer Design - Campus Network Architecture 1. Hierarchical Design 2. Spine-Leaf Architecture - Network Services 1. WLAN 2. QoS 3. Network Security
Advanced Routing and Switching Technology	37%	- Ethernet Switching 1. VLAN 2. STP/RSTP/MSTP 3. Stack & CSS 4. VXLAN - MPLS 1. MPLS TE 2. LDP 3. Basic Concepts 4. MPLS VPN 5. Configurations - IS-IS 1. Route Leaking 2. Network Types 3. Basic Concepts 4. Configurations and Troubleshooting 5. Addressing - Route Control 1. Route-policy 2. Route Filtering 3. IP Prefix List 4. ACL - OSPF 1. Area Types 2. LSA Types 3. Route Calculation 4. Basic Concepts 5. Configurations and Troubleshooting - BGP 1. Routing Policies 2. Basic Concepts 3. Configurations and Troubleshooting 4. Path Selection 5. Route Aggregation
Bearer WAN Planning and Deployment	15%	- Traffic Engineering 1. SR-TE 2. Flex-Algo 3. RSVP-TE - SR (Segment Routing) 1. SR-MPLS 2. SRv6 - VPN Services 1. L3VPN 2. EVPN

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Huawei HCIE-Datacom V1.0 Sample Questions (Q136-Q141):

NEW QUESTION # 136
OSPF is a mature protocol and is unlikely to have route computation errors in a regular networking environment under correct configurations. Which of the following statements are correct about the possible causes preventing an OSPF neighbor relationship from entering Full state?

A. A link works abnormally.
B. The router IDs of neighbors are the same.
C. The OSPF network types on both ends of the link are inconsistent.
D. The OSPF MTU values of interfaces on both ends of the link are different.

Answer: A,B,C,D

Explanation:
ForOSPF neighbors to reach Full state, they must exchangeLSAs (Link State Advertisements) properlyand synchronize their databases.
Possible Causes Preventing OSPF from Entering Full State:
#A. A link works abnormally
If thephysical or Layer 2 linkis unstable,OSPF Hello packetsmay be lost, preventing the Full state.
#B. The OSPF network types on both ends of the link are inconsistent
OSPF network types (Broadcast, P2P, NBMA, etc.) must matchon both ends.
Example: If one router isP2Pand the other isBroadcast, adjacency issues occur.
#C. The router IDs of neighbors are the same
Router ID conflicts prevent OSPF adjacencies from forming.
Each router must have aunique Router ID.
#D. The OSPF MTU values of interfaces on both ends of the link are different If MTU settings do not match,OSPF Database Description (DD) packets may be dropped, preventing Full state.
Reference from Huawei HCIE-Datacom Documentation:
Huawei OSPF Configuration Guide - Troubleshooting OSPF Neighbor Issues
HCIE-Datacom Study Material - OSPF Adjacency and Route Synchronization

NEW QUESTION # 137
R1 receives a common IPv6 packet from the CE and generates a packet carrying the SRH (Segment Routing Header), as shown in the figure. The packet is forwarded along the path R1 → R2 → R3 → R4. Identify the node type of each device based on their role in SRv6 processing.

Answer:

Explanation:

NEW QUESTION # 138
In SSP packages, Jinja2 templates are used to implement mapping. In the Jinja2 syntax, {% ... %} contains control structures, for example, a 'for' loop.

A. FALSE
B. TRUE

Answer: B

Explanation:
Understanding Jinja2 Templates in Huawei SSP Packages
🔹 What is Jinja2?
Jinja2 is a templating engine used in Huawei SSP (Smart Script Package) automation.
It allows dynamic configuration generation based on variables and logic.
🔹 Jinja2 Syntax Basics:
✅ {% ... %} → Used for control structures like loops and conditions.
✅ {{ ... }} → Used for variable placeholders.
Example of a Jinja2 Template Using {% ... %} for a Loop:
{% for interface in interfaces %}
interface {{ interface.name }}
description {{ interface.description }}
{% endfor %}
🔹 This template dynamically generates interface configurations based on a list of interfaces.
Why is the Answer TRUE?
✅ {% ... %} is used for control structures in Jinja2 templates (e.g., loops, if-else statements).
✅ Jinja2 templates are widely used in SSP for Huawei network automation.
Real-World Application:
Automated Network Configuration: Uses Jinja2 in Huawei SSP automation scripts.
Data Center & SDN Automation: Dynamically generates VXLAN, BGP, and OSPF configurations.
✅ Reference: Huawei HCIE-Datacom Guide - Jinja2 Templates in SSP Packages

NEW QUESTION # 139
Regarding BGP MED, which of the following descriptions is correct?

A. By default, if there is no MED value in the route attribute, it is processed by 0 If the bestroute med-none-as-maximum command is configured, MED is processed as the maximum 4294967295
B. The default value for the BGP routing MED is 0
C. By default, BGP routing rules can MED comparison of routes from different autonomous systems
D. In the BGP routing rules, MED has a lower priority than AS Path, Praferred-value, Local-Preference, etc Origin

Answer: A,B,D

NEW QUESTION # 140
Huawei's SDN controller using VXLAN technology is fixed?

A. Agile Controller-Campus
B. Agile Controller-DCN
C. Agile Controller-WAN

Answer: B

NEW QUESTION # 141
......

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