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

Analyzing the Routing Table Output:

The command display ipv6 routing-table protocol isis showsall IPv6 routes learned via IS-IS.

The output shows"Summary Count: 6", meaning R1 hassix IS-IS IPv6 routes.

Explanation of Correct Answers:✅A. R1 has six IS-IS IPv6 routes.

The "Summary Count: 6" confirms thatsix IS-IS IPv6 routes existin R1's routing table.

✅C. IS-IS IPv6 must have been enabled on GigabitEthernet0/0/1 of R1.

Theinterface GigabitEthernet0/0/1is listed as thenext-hop, meaning IS-IS IPv6 must beenabled on that interface.

✅D. R1 is not a Level-1 device.

The protocol is listed as"ISIS-L2", indicating that R1 is anIS-IS Level-2 (backbone) router,not a Level-1 router.

Incorrect Answer Explanation:❌B. R1 does not have IS-IS IPv6 routes.

Wrong!The output clearlyshows six IS-IS IPv6 routes, proving this statement false.

Reference from Huawei HCIE-Datacom Documentation:

Huawei IPv6 Routing Protocols Guide – IS-IS for IPv6

HCIE-Datacom Routing & Switching Training – IS-IS L1 & L2 Operations

Huawei IS-IS Configuration Guide – IPv6 Route Management

Understanding Route Reflectors (RRs) in Huawei SD-WAN

In Huawei’sSD-WAN Solution, BGPRoute Reflectors (RRs)are used toreduce the number of BGP peer relationshipsand optimize routing scalability.

????Key Functions of an RR in SD-WAN:

CentralizesBGP route distributionin large-scale SD-WAN networks.

Reducesfull-mesh BGP peering complexity.

Improves network scalabilityand convergence time.

Analysis of Each Deployment Mode:

✅B. Independent deployment of the RR

Correct:The RR is deployed as astandalonedevice, independent of the SD-WAN hub site.

Best for large-scale SD-WAN deploymentsrequiring dedicated route control.

✅C. Co-deployment of the RR and hub site

Correct:The RR is co-located with the SD-WANhub site, reducing infrastructure overhead.

Best for mid-sized SD-WAN deploymentswhere thehub and RR functions can be combined.

✅D. Partially independent deployment of the RR

Correct:The RR ispartially separatedfrom the hub but still shares some resources.

Provides a balance between full independence and co-location.

❌A. Multi-area deployment of the RR (Incorrect Choice)

Multi-area RR deployment isnot a common Huawei SD-WAN practice.

Huaweidoes not require separate RRs per area, as SD-WAN is based oncentralized policy-based routing.

Real-World Application:

Large Enterprise SD-WAN:Usesindependent RRsto optimizeglobal network routing.

Service Provider SD-WAN:Usesco-deployed RRsto reduce infrastructure costs while maintainingroute scalability.

✅Reference:Huawei HCIE-Datacom Guide – BGP Route Reflectors in SD-WAN Architecture

Comprehensive and Detailed Explanation:

On-premise moderefers to deploying theHuawei iMaster NCE-Campus controllerwithin the enterprise network instead of using a cloud-based solution.

✔Best suited forsmall and midsize campus networksthat require:

Greater control over data security

Local network automation

No reliance on cloud connectivity

Sinceon-premise mode is recommended for small and midsize campus networks, the statement isTRUE.

????Reference:Huawei HCIE Datacom – iMaster NCE Deployment Modes

Comprehensive and Detailed In-Depth Explanation:

The statementAis incorrect because enablingDHCP snooping in the VLAN viewonly takes effect on interfaces within that specific VLAN that have DHCP snooping configured. It doesnot automatically apply to all interfaces of the device. Each interface within the VLAN must individually be configured or marked as trusted/untrusted.

B:Correct, as DHCP snooping, when enabled globally without any additional specifications, defaults to processingDHCPv4messages.

C:Correct, as DHCP snooping can protect against DHCP spoofing attacks by marking interfaces astrustedoruntrusted.

D:Correct, enabling DHCP snooping on an interface means it will monitor all DHCP messages on that specific interface.

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.

Network Slicing Using Channelized Sub-Interfaces and FlexE

Bothchannelized sub-interfacesandFlexE (Flexible Ethernet)are used fornetwork slicing, but they have differentapplication scenarios:

✅A. Channelized sub-interface is recommended for interfaces with bandwidth < 50 Gbit/s.

Channelized sub-interfacessplit a physical interfaceinto multiple logical sub-interfaces.

Best for lower-bandwidth links (<50 Gbit/s).

✅B. FlexE is recommended for 50GE and higher-rate interfaces.

FlexEdivides a high-bandwidth physical link(e.g.,100GE, 400GE) into multiple virtual slices.

Used in high-speed backbone and data center networks.

✅C. Only FlexE-based network slicing can be deployed across OTN devices.

FlexE is compatible with Optical Transport Network (OTN)and can be used for long-haul slicing across OTN.

❌D. Only channelized sub-interface-based network slicing can be deployed across MSTP devices.

Incorrect!While MSTP supports channelized interfaces,FlexE is not restricted to MSTP deployment.

Reference from Huawei HCIE-Datacom Documentation:

Huawei FlexE Technology Whitepaper – Network Slicing in Transport Networks

HCIE-Datacom Training Material – Channelized Sub-Interface and FlexE in Network Slicing