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Huawei H12-891_V1.0 - HCIE-Datacom V1.0

Last Update Mar 23, 2026

Huawei Certification Exams Pack

Everything from Basic, plus:
  • Exam Name: HCIE-Datacom V1.0
  • 322 Questions Answers with Explanation Detail
  • Total Questions: 322 Q&A's
  • Single Choice Questions: 196 Q&A's
  • Multiple Choice Questions: 88 Q&A's
  • Fill in the Blanks Questions: 22 Q&A's
  • Drag Drop Questions: 16 Q&A's


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Total Questions: 322
Free Practice Questions: 68

In a scenario where a VXLAN tunnel is dynamically established through BGP EVPN, which of the following statements about symmetric IRB forwarding are correct?

Options:

A.

Both the ingress VTEP and egress VTEP forward packets based on the Layer 3 forwarding table.

B.

The ingress VTEP forwards packets based only on the Layer 2 forwarding table.

C.

The egress VTEP forwards packets based only on the Layer 2 forwarding table.

D.

When VTEPs forward inter-subnet user communication packets, the VNI carried in the VXLAN header is the L3VNI.

Answer
A, D
Explanation

VXLAN Inter-Subnet Routing with Symmetric IRB

VXLAN supports inter-subnet routing using Integrated Routing and Bridging (IRB). In symmetric IRB, both ingress and egress VTEPs perform Layer 3 forwarding to ensure efficient packet forwarding across subnets.

✅ A. Both the ingress VTEP and egress VTEP forward packets based on the Layer 3 forwarding table.

    In symmetric IRB, both ingress and egress VTEPs perform Layer 3 lookup and forwarding.

    The ingress routes packets before encapsulating them in VXLAN, and the egress performs another Layer 3 lookup to determine final delivery.

✅ D. When VTEPs forward inter-subnet user communication packets, the VNI carried in the VXLAN header is the L3VNI.

    L3VNI (Layer 3 VXLAN Network Identifier) is used for inter-subnet routing between VXLAN segments.

NETCONF uses an XML-based encoding format. NETCONF uses text files to represent complex hierarchical data. Which of the following statements are correct about the following XML file?

< ?xml version= " 1.0 " encoding= " UTF-8 " ? >

< note >

< to > Learners < /to >

< from > Huawei < /from >

< heading > Reminder < /heading >

< body > Don ' t forget Reading! < /body >

< /note >

Options:

A.

encoding: indicates the character set encoding format. Currently, only UTF-8 encoding is supported.

B.

/: indicates the end of the current tag.

C.

< ?: indicates the start of an instruction.

D.

? > : indicates the end of an instruction.

Answer
A, B, C, D
Explanation

✅ A. encoding: indicates the character set encoding format. Currently, only UTF-8 encoding is supported.

    UTF-8 is the default and only supported character encoding in NETCONF XML.

✅ B. /: indicates the end of the current tag.

    In XML, < /tag > closes an element, defining the end of a structure.

✅ C. < ?: indicates the start of an instruction.

    The < ?xml line declares an XML document and its version/encoding.

✅ D. ? > : indicates the end of an instruction.

    Closes the XML declaration.

Reference from Huawei HCIE-Datacom Documentation:

    Huawei NETCONF Development Guide – XML Formatting Rules

    HCIE-Datacom Training Material – Understanding XML in Network Automation

On a virtualized network deployed using iMaster NCE-Campus, after creating VNs, you need to configure inter-VN communication. Which of the following configurations is used to achieve VN communication?

Options:

A.

Configure traffic filtering.

B.

Create a static route for the VPN instance corresponding to the VN.

C.

Deploy OSPF for the VPN instance corresponding to the VN.

D.

Deploy a routing policy.

Answer
D
Explanation

In Huawei’s CloudCampus Solution, VNs (Virtual Networks) are isolated by default for security purposes. To enable inter-VN communication, you must explicitly configure policies that allow traffic between different VNs.

    The correct way to control and enable this communication is via routing policies, especially inter-VN routing policies on the core or border nodes.

    Static routes or OSPF deployments are not sufficient or appropriate for policy-controlled VN communication in this context.

Correct answer: D. Deploy a routing policy

[Reference:Huawei HCIE-Datacom V1.0 Study Guide —Chapter: Virtual Network Deployment with iMaster NCESection: Inter-VN Routing Configuration, , ]

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