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

Static information collection and analysisrefers to gatheringnon-changing (static) parametersof the network devices. These parameters are mostlyconfiguration-relatedand do not fluctuate dynamically.

Explanation of Correct Options:

✅A. Device types

Includes information about thehardware platform, model, and series of the device.

Example:Huawei NE40E, CE12800, or AR routers.

✅C. License

Licenses define feature capabilities, such as MPLS, BGP, or security functions.

Licenses arestatic parametersbecause they do not change unless manually updated.

Incorrect Options:

❌B. Interface types

Interface types (GigabitEthernet, FastEthernet, Serial, etc.)can changedepending on hardware or software configurations.

They arenot staticbecause interfaces can beadded or removed dynamically.

❌D. Packet loss rate

Packet loss rate is a dynamic parameter, as it varies depending on network conditions, congestion, or faults.

It is used inperformance monitoringrather than static data collection.

Reference from Huawei HCIE-Datacom Documentation:

Huawei Network Management Best Practices – Static & Dynamic Data Collection

HCIE-Datacom Guide – Network Monitoring and Analysis

Huawei NCE-Campus Network Health Check Manual

The Loopback interface is not advertised by default in IS-IS, unless a specific command is used (like network entity with loopback settings or enabling it manually). In this case, the GE0/0/0 and GE0/0/1 interfaces are both UP, and have IS-IS L1/L2 enabled. These two interfaces qualify to advertise IS-IS routes.

Exact Extract - Huawei HCIE-Datacom V1.0 IS-IS Chapter

“By default, only physical interfaces in UP state and configured with IS-IS (L1, L2, or L1/L2) participate in IS-IS. Loopback interfaces must be explicitly advertised using route import policies.”

IS-IS was originally designed for IPv4, but extensions via TLVs (Type-Length-Value) allow it to support IPv6. These are referred to as New IS-IS TLVs, including TLV 236 (IPv6 Reachability), TLV 232 (IPv6 Interface Address), etc. These TLVs are crucial for IPv6 route computation within IS-IS.

Exact Extract - HCIE-Datacom Guide – IPv6 Routing Protocols Chapter

“IS-IS uses new TLVs such as TLV 236 and TLV 232 to carry IPv6 prefix and interface address information. These TLVs are essential to enable IPv6 route calculation.”

An IPsec Security Association (SA) includes the following critical components:

SPI (Security Parameter Index)

Destination IP address

Security Protocol (AH or ESP)

Encryption/Authentication algorithms

The Source IP address is not a defining parameter of an SA. SA is unidirectional and identified based on the SPI and destination address.

Exact Extract - Huawei Security Configuration Guide – IPsec Fundamentals:

“An SA is uniquely identified by the SPI, destination IP, and security protocol. The source address is not a determining factor in the SA.”

Forwarding Equivalence Class (FEC)is a key concept inMPLS (Multiprotocol Label Switching), where packets with thesame forwarding characteristicsare grouped into an FEC and assigned a label.

Correct Answers (Cannot be Used for FEC Allocation):

A. Fragment Offset–Incorrect as an FEC allocation standard

Fragment offset is used forreassembling fragmented IP packetsat the receiver side.

It isnot relevant for MPLS label assignment.

B. Application Protocol–Incorrect as an FEC allocation standard

MPLSdoes not classify packets based on application-layer protocols(e.g., HTTP, FTP).

It worksmainly at Layer 2 and Layer 3.

Incorrect Answers (Valid FEC Allocation Standards):

C. Destination Address–Valid FEC allocation criterion

One of themost commonMPLS FEC classifications.

Packets with thesame destination are groupedinto the same FEC.

D. Class of Service (CoS)–Valid FEC allocation criterion

MPLS usesCoS-based traffic classification(e.g., Exp bits in MPLS headers).

Different CoS levels can be mapped to different labels.

Reference from Huawei HCIE-Datacom Documentation:

Huawei MPLS Technology Guide – FEC and Label Assignment

HCIE-Datacom MPLS VPN Configuration Guide

GRE (Generic Routing Encapsulation)supports encapsulation of many protocol types:

SupportsIPv4 and IPv6 unicastencapsulation —✅

Doesnot support IPv6 broadcastencapsulation. GRE doesn’t natively handle multicast or broadcast IPv6 traffic well —❌

It is a lightweight tunneling protocol and relativelyeasy to deploy, placing minimal overhead on devices —✅

Correct answer: C. GRE can encapsulate IPv6 broadcast packets— is incorrect.

Comprehensive and Detailed In-Depth Explanation:

In the Label Distribution Protocol (LDP) session establishment process, theInitialization messageis sent by the initiator to propose parameters for the session. If the responder finds that the proposed parameters are not acceptable, it responds with anError Notification Message. This message indicates that the session could not be established due to incompatible or incorrect parameters.

TheError Notification Messagetypically includes details about why the session could not be established, such as parameter mismatch or unsupported features. If the parameters are acceptable, the responder would instead reply with aKeepalive Messageto maintain the session.

Challenges of Static VXLAN Tunnel Configuration

Astatic VXLAN tunnelrequires manualVTEP-to-VTEP configuration, making it complex to maintain.

✅A. Heavy configuration workload in a distributed gateway scenario

Static VXLAN requires manual configuration of VTEP mappings, making itdifficult to scale and adjustwhen adding new VTEPs.

✅B. Remote MAC addresses are learned through data flooding

UnlikeBGP EVPN-based VXLAN, whichadvertises MAC/IP bindings through BGP,static VXLAN relies on flooding for MAC learning, causingexcessive traffic.

✅D. N(N-1)/2 tunnels are required for full mesh connectivity

IfN devices need to communicate, each must be manually configured withN(N-1)/2 VXLAN tunnels, leading tohigh administrative overhead.

Incorrect Statement Explanation:

❌C. Static VXLAN tunnels use protocols on the control plane, consuming device resources.

Wrong!Static VXLANdoes not use a control plane protocollike BGP EVPN.

Instead,it relies entirely on static mappings, reducing control plane usage.

Reference from Huawei HCIE-Datacom Documentation:

Huawei VXLAN Configuration Guide – Static vs. Dynamic VXLAN Tunnel Establishment

HCIE-Datacom Training Material – Manual Configuration Challenges in Static VXLAN

The command output shows:

*>i before both networks, which means these routes are the preferred routes (*) and are learned via internal BGP (i).

Two networks are listed: 3002::3 and 3002::4, which means R1does havethese two routes in its BGP IPv6 routing table.

For 3002::4, the path origin shows 65001 i, which means this route originated from AS 65001 and was learned through IBGP.

The AS Path attribute is only shown for 3002::4, but both routes are clearly present.

Therefore, the correct conclusion is:

D. R1 has routes 3002::3/128 and 3002::4/128.