Pass the Huawei HCIE-Datacom H12-891_V1.0 Questions and answers with ValidTests

Comprehensive and Detailed In-Depth Explanation:

TheHuawei SD-WAN Solutioninvolves four types of channels to ensure smooth and efficient network operation:

Management Channel (A):Used for managing and monitoring SD-WAN devices. It facilitates communication between theiMaster NCE-Campus controllerand SD-WAN devices.

Control Channel (B):Responsible for transmittingcontrol plane informationsuch as routing updates and protocol control messages.

Data Channel (C):Carries actualuser data trafficover the SD-WAN network.

Orchestration Channel (D):Used forservice orchestration, configuration delivery, and policy management.

All four channels work together to provide comprehensive network management, data transmission, and service orchestration in an SD-WAN environment.

6PE (IPv6 Provider Edge over MPLS) vs. 6VPE (IPv6 VPN Provider Edge over MPLS VPNs)

6PE (IPv6 over MPLS without VPNs):

Uses global IPv6 routingover MPLS.

No VPN instances (VRFs) are created on PEs.

IPv6 addresses cannot be reusedacross different CEs because all traffic is routed using a single global table.

6VPE (IPv6 over MPLS with VPNs):

Uses MPLS VPN (VRF instances) to provide IPv6 VPN services.

VPN instances (VRFs) are created on PEsto separate customer networks.

IPv6 addresses of CEs can be reusedin different VPN instances because each VRF maintains separate routing tables.

Correct Answer Explanation:

✅C. In 6VPE networking, IPv6 addresses of a CE can be reused.

Sinceeach VPN instance (VRF) maintains its own IPv6 routing table, IPv6 addresses of CEscan be reused across different VPNs.

Incorrect Answer Explanations:

❌A. In 6PE networking, VPN instances need to be created on PEs.

Wrong!6PEdoes not use VPN instances (VRFs); it relies on a global IPv6 routing table.

❌B. In 6PE networking, IPv6 addresses of a CE can be reused.

Wrong!Since 6PE uses asingle IPv6 global routing table, IPv6 addressescannot be reused.

❌D. In 6VPE networking, no VPN instance needs to be created on PEs.

Wrong!6VPErequires VPN instances (VRFs) on PEsto separate customer traffic.

Reference from Huawei HCIE-Datacom Documentation:

Huawei MPLS VPN Configuration Guide – 6PE and 6VPE Deployment

HCIE-Datacom Training Material – IPv6 MPLS Solutions

Comprehensive and Detailed Explanation:

OSPFv2 (for IPv4) and OSPFv3 (for IPv6) LSAs differ in function and naming conventions.

Key Differences in OSPFv3 LSAs:

OSPFv3does not use ASBR-Summary-LSA. Instead, it introduces newInter-Area Prefix LSAs (Type 3) and Inter-Area Router LSAs (Type 4).

OSPFv2 ASBR-Summary-LSA (Type 4) is replaced in OSPFv3 by Inter-Area Router LSA (Type 4).

OSPFv3 LSA Types:

✔Router-LSA (Type 1)– Describes router interfaces and links.

✔Network-LSA (Type 2)– Describes broadcast network links.

✔Inter-Area Prefix LSA (Type 3)– Replaces Summary LSAs for routes.

✔Inter-Area Router LSA (Type 4)– Replaces ASBR Summary LSAs.

✔AS-External LSA (Type 5)– Describes external routes (same as OSPFv2).

SinceASBR-Summary-LSA (Type 4) does not exist in OSPFv3, the correct answer isA.

????Reference:Huawei HCIE Datacom – OSPFv3 LSA Types

Comprehensive and Detailed In-Depth Explanation:

In SR-MPLS, ifprefix SIDs conflict, the following principles are applied:

Prefix with a smaller value (numerically lower SID) wins.

If the prefix length is the same, the lower SID value is selected.

In this case:

Both1.1.1.1/32 2 (A)and1.1.1.1/32 1 (B)have the same prefix length.

SinceSID 1is numericallysmallerthanSID 2,B (1.1.1.1/32 1)is selected.

The other routes (C and D) have different prefixes and do not directly conflict.

A screenshot of a computer AI-generated content may be incorrect.

InOSPFv3, each LSA type has adefined flooding scope:

Link-LSA (Type 8)

Advertisedonly on the local link

Contains router’s link-local address and prefixes

Scope:Within the local link scope✅

AS-External-LSA (Type 5)

Used to advertiseexternal routes from outside the AS

Flooded across theentire autonomous system, except stub/NSSA areas

Scope:Within an AS✅

Network-LSA (Type 2)

Generated by theDesignated Router (DR)

Describes all routers on a broadcast or NBMA segment

Floodedwithin the originating area

Scope:Within an area✅

Correct Mappings:

Link LSA→Within the local link scope

AS-External-LSA→Within an AS

Network-LSA→Within an area

Comprehensive and Detailed Explanation:

✔Huawei OPS (Open Programmability System)followsRESTful API principles, usingHTTP methodsfor device management.

✔HTTP Methods Used in OPS:

✅GET→ Retrieves data from the device.

✅POST→ Creates new data/configurations.

✅PUT→ Replacesentire configuration objects.

✅PATCH→Updates specific fieldsof a configuration object.✅(Correct Answer)

SincePATCH is used for modifying specific values in managed objects, the correct answer isD.

????Reference:Huawei HCIE Datacom – RESTful API Operations in Huawei OPS

Comprehensive and Detailed Explanation:

The IS-IS peer output shows:

IPv4 Peer Address:10.1.34.1

IPv6 Peer Address:FE80::2E0:FCFF:FE98:2576

MT IDs (Multi-Topology) Supported:0 (IPv4), 2 (IPv6)

Sinceboth IPv4 and IPv6 peer addressesare listed, it confirms thatboth IPv4 and IPv6 IS-IS neighbor relationships are establishedbetweenR4 and ee8c.a0c2.baf3.

????Reference:Huawei HCIE Datacom – IS-IS Multi-Topology Support

Huawei AR routers used as egress gateways in CloudCampus solutions support multiple onboarding and deployment methods, including:

DHCP Option 148-based auto-deployment

Web-based management

CLI-based deployment and configuration (also supported)

So, the statement is incorrect—CLI-based deployment is supported.

Exact Extract - Huawei CloudCampus AR Router Deployment Guide:

“AR series routers support multiple deployment methods including CLI, DHCP Option 148, and web-based registration.”

The provided Python code uses the requests.post() function to make an HTTP POST request to retrieve a token from iMaster NCE. The body is structured using the json={} parameter, which serializes the dictionary into JSON format. The proper content-type and accept headers are included.

Let's analyze each option:

✅ Option A is correct: The print(r.json()) is a valid method to display JSON response from the server.

✅ Option B is correct: The token URL is constructed correctly: https://139.9.213.72:18002/controller/v2/tokens.

✅ Option C is correct: The request body is clearly in JSON format, specified by the json={...} argument.

❌ Option D is incorrect: The HTTP method used is POST, not GET. The statement is false, making it the correct answer to select.

Huawei Official Documentation Reference:

“To obtain a token, the client sends a POST request to /controller/v2/tokens, including credentials in the request body in JSON format.”

(Source: Huawei iMaster NCE RESTful API Reference Guide – Authentication Section)

Huawei iMaster NCE-Campus as an Authentication Relay Agent

HuaweiiMaster NCE-Campuscan act as arelay agentfor authentication services, forwarding authentication requests between users and authentication servers (e.g., RADIUS, LDAP).

✅B. User Authentication

Validates user credentialsbefore granting network access.

Supports802.1X, Portal, MAC, and RADIUS authentication.

✅C. User Analysis

Analyzes user behavior and access patternsto optimize security and network policies.

✅D. Marketing

Providescustomized authentication portalswithadvertisements and promotional messages.

Incorrect Answer:

❌A. User Accounting–Accounting is handled by the authentication server (e.g., RADIUS), not the relay agent.

Reference from Huawei HCIE-Datacom Documentation:

Huawei iMaster NCE-Campus Authentication Guide – Relay Agent Functions

HCIE-Datacom Study Material – User Authentication and Analysis in CloudCampus