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

Comprehensive and Detailed In-Depth Explanation:

Telemetry in a narrow senserefers specifically to thedevice-side telemetryprocess, which includes the following key modules:

Data generation (A):The device collects and generates telemetry data, such as performance metrics or operational statistics.

Data push (B):The deviceactively pushes the collected datato the configured destination (such as a collector or management system) using a data streaming protocol.

Data source (C):The entity on the device that generates or provides themonitored data.

Data subscription (D)isnot part of the device-side telemetry; it is related to themanagement system side, where users subscribe to specific telemetry data streams.

Therefore, the correct answers areA, B, C.

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

VXLAN tunnel configuration, you donot use a control planelike BGP EVPN. Instead, youmanually configureall necessary forwarding parameters, including:VNI (VXLAN Network Identifier): Identifies the VXLAN segment.VTEP IP Address: The remote tunnel endpoint.Ingress Replication List: Required for multicast emulation (flooding/BUM traffic) in the absence of a multicast control plane.Whenconfiguring statically, theVNIis essential to map Layer 2/3 services to the correct VXLAN segment.Thus, the correct word to complete the sentence is:VNICorrect answer: VNI

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

Traffic Diversion in SR-MPLS Policy

SR-MPLS Policiesuse traffic steering mechanismsto direct specific flows toSegment Routing paths (SR Policies). When multiple services share thesame destination address,color-based traffic diversionensuresdifferentiated service treatment.

✅B. Color-based traffic diversion (Correct Answer)

Traffic is classified based on "color" (a BGP-SR policy attribute) and mapped to different SR-MPLS tunnels.

Different colors represent different paths(e.g., high-priority services can use an optimized low-latency path).

This method ensures service qualityby directing traffic according topolicy-based routing decisions.

Comprehensive and Detailed In-Depth Explanation:

The diagram shows aWAN networkwhereSegment Routing (SR)is used in conjunction with theiMaster NCEcontroller. The network consists ofData Centers (DCs),Branches,Provider Edge (PE)routers, andRoute Reflectors (RR)withinAS 65600. Let's analyze each network technology and its placement in the scenario.

1. BGP-LS (Border Gateway Protocol - Link State):

Application Location:1 (PE to RR)

BGP-LS is used tocollect and distribute network topology informationfrom theIGP (Interior Gateway Protocol)domain.

It enables theiMaster NCE(controller) to learn about the network topology and SR information from PE routers.

The PE routers send theirlink-state informationto theRRusingBGP-LS.

Why Location 1:

The RR collects topology data from PEs and forwards it to the controller for path computation.

2. BGP (Border Gateway Protocol):

Application Location:2 (RR to iMaster NCE)

Standard BGP is used forroute distributionandnetwork connectivity.

The RR usesBGPto exchange route information with thecontroller(iMaster NCE).

Why Location 2:

TheRRaggregates routes and exchanges them with the iMaster NCE for centralized management.

3. MP-IBGP (Multiprotocol Internal BGP):

Application Location:3 (PE to PE)

MP-IBGP is used toexchange VPNv4 and VPNv6 routesbetween PE routers within thesame AS.

It allows PEs toadvertise VPN routesacross thebackbone network.

Why Location 3:

PEs need to communicate VPN-related information within the AS, ensuring end-to-end connectivity between DCs and branches.

4. BGP SR-Policy/PCEP (Path Computation Element Protocol):

Application Location:4 (iMaster NCE to PE)

BGP SR-Policy andPCEPare used by thecontrollertodistribute SR policiesto the PE routers.

TheiMaster NCEcalculates optimal paths and sends the SR policies to PEs viaBGP SR-PolicyorPCEP.

Why Location 4:

The controller programs theSegment Routing pathsdirectly to the PEs for optimal traffic engineering.

Why This Mapping Is Correct:

The mapping is based on theroles and functions of each protocolwithin theSR-based WAN architecture. The controller uses BGP-LS to learn topology, BGP for route reflection, MP-IBGP for VPN route exchange, and BGP SR-Policy/PCEP for path computation and distribution.

Comprehensive and Detailed Explanation:

VGMP (Virtual Group Management Protocol)is used inHuawei firewallsforhot standby and high availability.

When is VGMP Activated?✔Whenhot standby is enabled, firewalls must synchronize their states to maintain failover capability.✅✔VGMPsends packets periodicallyto check if the standby firewall is operational.

Why Other Options Are Incorrect?❌Priority increase (B):Does not trigger VGMP packets directly.❌Link detection timeout (C):Affects failover but does not initiate VGMP packets.❌Hot standby being disabled (A):Disables VGMP, preventing packets from being sent.

Thus, the correct answer isD.

📖Reference:Huawei HCIE Datacom – Firewall Hot Standby and VGMP

Authentication Header (AH) in IPsec

TheAuthentication Header (AH) protocolis part ofIPsecand providesauthentication, integrity, and replay protectionbutdoes NOT provide encryption.

✅B. AH provides data origin authentication.

Ensures thatpackets come from a trusted sourceusing cryptographic signatures.

✅C. AH provides anti-replay protection.

Usessequence numbersto prevent attackers from replaying old packets.

✅D. AH provides data integrity authentication.

Ensuresdata integrityby verifying that packetshave not been tampered withduring transmission.

❌A. AH provides packet encryption – Incorrect!

AH does not encrypt packet contents.It only authenticates headers.

ESP (Encapsulating Security Payload) is used for encryption in IPsec.

Reference from Huawei HCIE-Datacom Documentation:

Huawei IPsec Configuration Guide – AH vs. ESP

HCIE-Datacom Training Material – IPsec Security Mechanisms