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| Certification Vendor: | Huawei |
|---|---|
| Exam Name: | HCIP-Datacom-Advanced Routing & Switching Technology V1.0 |
| Exam Number: | H12-831_V1.0 |
| Passing Score: | 600/1000 |
| Available Languages: | English, Chinese |
| Exam Duration: | 90 minutes |
| Exam Format: | True/False, Single choice, Multiple choice |
| Exam Price: | USD 200 (varies by region) |
| Related Certifications: | HCIP-Datacom-Core Technology HCIE-Datacom HCIA-Datacom |
| Real Exam Qty: | 60 |
| Certificate Validity Period: | 3 years |
| Recommended Training: | Huawei Talent Online Learning |
| Exam Registration: | Huawei Certification Official Portal |
| Sample Questions: | Huawei H12-831_V1.0 Sample Questions |
| Exam Way: | Online proctored or authorized testing center (onsite) |
| Pre Condition: | Recommended to hold HCIA-Datacom certification or equivalent networking knowledge. |
| Official Syllabus URL: | https://e.huawei.com/en/talent/#/cert |
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Huawei H12-831_V1.0-ENU exam is a challenging certification that requires a significant amount of time and effort to prepare for. Candidates need to have a deep understanding of advanced routing and switching technologies and be able to apply their knowledge in real-world scenarios. However, passing H12-831_V1.0 Exam will prove that you have the expertise required to design, implement, and troubleshoot complex datacom networks.
NEW QUESTION # 202
The figure shows the logical network architecture of a migration project. The purpose of the migration is to add network device R4 between R2 and R3. OSPF runs between network devices. After the physical network is connected, a network engineer incorrectly imports the backup configuration of R3 to R4 during the migration. Given this, which of the following statements are true?
Answer: B,C,D
Explanation:
OSPF adjacency establishment requires compatible interface parameters, including area IDs, Hello and Dead intervals, authentication settings, and unique router IDs between neighboring devices.
In the displayed migration topology, R1 and R3 retain their Area 1 connection and can establish an OSPF adjacency.
After R4 replaces the original R2-R3 connection, R2 and R4 can also establish an adjacency because their router IDs differ, assuming compatible interface configuration.
However, R3 and R4 cannot establish an OSPF neighbor relationship. They are not directly connected in the displayed topology and share the same router ID because R4 was configured using R3 ' s backup.
The Area 0 connection between R1 and R2 is unchanged, so their established OSPF neighbor relationship remains unaffected.
NEW QUESTION # 203
Match the alarm severity to the severity of the fault and countermeasures
Answer: B
NEW QUESTION # 204
In order to speed up the perception of link failures in the IS-IS network, IS-IS can be linked with BFD.
Answer: A
NEW QUESTION # 205
In the figure, an administrator needs to enable MPLS LDP on R1 to R4. Which of the following configurations of R1 is correct?
Answer: D
Explanation:
Comprehensive and Detailed In-Depth Explanation:
To determine the correct configuration, we need to analyze how MPLS LDP (Label Distribution Protocol) is correctly enabled on a Huawei router.
1. Required Steps to Enable MPLS LDP on R1
To enable MPLS LDP on R1 and establish LDP sessions, the following steps must be followed:
# Step 1: Configure the MPLS LSR ID (Loopback IP recommended)
* MPLS LSR ID is a unique identifier for the Label Switch Router (LSR).
* Command:
shell
CopyEdit
mpls lsr-id 1.1.1.1
* Why?
* The LSR ID must be configured for LDP to function properly in an MPLS network.
* It is usually set to a loopback address for stability and consistency.
# Step 2: Enable MPLS Globally
* Command:
shell
CopyEdit
mpls
* Why?
* This enables MPLS forwarding on the device.
# Step 3: Enable MPLS LDP Globally
* Command:
shell
CopyEdit
mpls ldp
* Why?
* LDP is needed for label distribution in the MPLS domain.
* Without this, routers cannot exchange MPLS labels.
# Step 4: Enable MPLS and LDP on the Required Interface
* Command:
shell
CopyEdit
interface gigabitethernet 0/0/1
mpls
mpls ldp
* Why?
* MPLS must be enabled on interfaces that participate in MPLS forwarding.
* LDP must also be enabled on these interfaces to distribute labels over MPLS links.
2. Analyzing the Answer Choices
# Option B (Correct)
shell
CopyEdit
[R1] mpls lsr-id 1.1.1.1 # (Sets LSR ID)
[R1] mpls # (Enables MPLS globally)
[R1-mpls] quit
[R1] mpls ldp # (Enables LDP globally)
[R1-mpls-ldp] quit
[R1] interface gigabitethernet 0/0/1
[R1-GigabitEthernet0/0/1] mpls # (Enables MPLS on interface)
[R1-GigabitEthernet0/0/1] mpls ldp # (Enables LDP on interface)
[R1-GigabitEthernet0/0/1] quit
* This configuration correctly enables MPLS LDP on R1.
* All required steps are followed, including the LSR ID, MPLS, LDP, and interface activation.
# Option A (Incorrect)
shell
CopyEdit
[R1] mpls lsr-id 1.1.1.1
[R1] mpls
[R1-mpls] quit
[R1] mpls ldp
[R1-mpls-ldp] quit
[R1] interface gigabitethernet 0/0/1
[R1-GigabitEthernet0/0/1] mpls #
[R1-GigabitEthernet0/0/1] quit # (Missing "mpls ldp" under interface)
* Missing mpls ldp under interface configuration.
* Without this, the interface will not establish an LDP session # Incorrect.
# Option C (Incorrect)
shell
CopyEdit
[R1] mpls
[R1-mpls] quit
[R1] mpls ldp
[R1-mpls-ldp] quit
[R1] interface gigabitethernet 0/0/1
[R1-GigabitEthernet0/0/1] mpls
[R1-GigabitEthernet0/0/1] mpls ldp
[R1-GigabitEthernet0/0/1] quit
* Missing mpls lsr-id 1.1.1.1.
* LSR ID is critical for LDP sessions # Incorrect.
# Option D (Incorrect)
shell
CopyEdit
[R1] mpls lsr-id 1.1.1.1
[R1] mpls
[R1-mpls] quit
[R1] interface gigabitethernet 0/0/1
[R1-GigabitEthernet0/0/1] mpls
[R1-GigabitEthernet0/0/1] mpls ldp
[R1-GigabitEthernet0/0/1] quit
* Missing global MPLS LDP configuration (mpls ldp).
* Without enabling LDP globally, labels will not be distributed.
* This makes LDP sessions fail. # Incorrect.
NEW QUESTION # 206
On an MPLS network where LDP is used to establish LSPs, a transit node directly connected to the ingress node that sends a label request distributes labels to the ingress node only after receiving a label mapping message from the egress node. In this case, which of the following is the correct combination of the label advertisement mode and label distribution control mode?
Answer: B
Explanation:
The label advertisement mode is Downstream-on-Demand (DoD) because the ingress node explicitly sends a Label Request message. In DoD mode, an LSR does not automatically advertise a label binding for a FEC.
It waits until the upstream LSR requests the label.
The label distribution control mode is ordered because the transit LSR waits until it receives a Label Mapping message from its downstream node-the egress in this topology-before advertising a corresponding label mapping to the ingress.
The two characteristics are therefore:
* DoD: A label is advertised only after an upstream Label Request is received.
* Ordered control: A transit LSR advertises a label mapping only after it has received the downstream label mapping or when the local LSR itself is the egress for the FEC.
Independent control would allow the transit LSR to allocate and advertise its own label without first obtaining a label mapping from the downstream node. That contradicts the behavior described in the question.
Therefore, the correct combination is DoD + ordered . Huawei LDP label advertisement modes
NEW QUESTION # 207
......
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