H12-891_V1.0 Exam Dumps - HCIE-Datacom V1.0

Comprehensive and Detailed In-Depth Explanation:

By default, OSPF does not automatically associate a domain ID with a process ID. The concept of "domain ID" is primarily used when redistributing routes between OSPF and BGP, particularly in MPLS VPN scenarios. The domain ID in OSPF helps maintain loop prevention and correct route advertisement between different OSPF domains. You can manually configure the domain ID using the domain-id command within the OSPF process view, but it is not inherently set to the process ID.

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

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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:

✔HTTP Status Code 401 Unauthorizedindicates thatauthentication credentialswere either:

Missing(e.g., no API key or token).

Invalid(e.g., expired session, incorrect credentials).

✔Error Code Breakdown:

✅(D) "Unauthorized" (Correct)→ Indicates the clientmust authenticate first.

❌(A) "Service Unavailable" (503)→ Used when theserver is down.

❌(B) "Access Denied" (403)→ Used when the clientlacks permissioneven after authentication.

❌(C) "Not Found" (404)→ Used when theresource does not exist.

📖Reference:Huawei HCIE Datacom – iMaster NCE-Campus RESTful API Error Codes

Huawei Open Programmability System (OPS) and Scripting Support

HuaweiOPS (Open Programmability System)enables network automation usingscript-based programmingfordevice management and configuration.

✅Python is the primary language integrated into Huawei OPS.

Python scripts can automate device configurations, monitoring, and troubleshooting.

OPS supports Python libraries for interacting with network APIs and CLI commands.

Used for Huawei CloudCampus, SDN, and Datacom devices.

Comprehensive and Detailed Explanation:

✔SR Policies are dynamically computed and delivered by the SDN controllerin an SR-MPLS or SRv6 network.

✔Correct Statements:

✅(A)NETCONFis used fordelivering configurationslikerouting policies and service interfaces.

✅(B)BGP-LS (Link-State)is used tocollect topologyandcompute SR Policies.

✅(D)BGP IPv6 SR Policydistributes SR policy attributes likecolor, headend, and endpoints.

✔Why Is (C) Incorrect?

❌(C) The controller does not use telemetry to deliver SID entries—telemetry is used forreal-time monitoring, not path computation.

📖Reference:Huawei HCIE Datacom – SR Policy and Controller-Based Path Computation

In Huawei'sSRv6 instruction namingsystem, each letter keyword represents a specific forwarding behavior:

X (Cross): Forwards packets viaspecified Layer 3 interfaces→✅

M (MAC): SearchesLayer 2 forwarding tableforbroadcast/multicast,not unicast→❌

V (VPN): Searches theVPN routing table (VRF)for forwarding →✅

T (Table): Searches aspecific routing table (e.g., user-defined)→✅

Correct answers: A, C, D