H12-831_V1.0-ENU Braindumps PDF, Huawei H12-831_V1.0-ENU Exam Cram
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The HCIP-Datacom-Advanced Routing and Switching Technology V1.0 certification is highly valued in the IT industry. It is recognized globally and is proof of a candidate's expertise in the field of Datacom-Advanced Routing and Switching Technology. It is an excellent certification for professionals who are looking to enhance their career prospects and take on more challenging roles in the networking industry.
The HCIP-Datacom-Advanced Routing & Switching Technology V1.0 exam is a comprehensive exam that covers a wide range of topics related to advanced routing and switching technology. H12-831_V1.0-ENU exam covers topics such as network planning and design, network implementation and management, network security, and advanced routing and switching protocols.
NEW QUESTION # 65
In the figure, an administrator needs to enable MPLS LDP on R1 to R4. Which of the following configurations of R1 is correct?
- A. [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 - B. [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] mpls ldp
[R1-GigabitEthernet0/0/1] quit - C. [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 - D. [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
Answer: B
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 # 66
R1 and R2 use directly connected interfaces to establish an EBGP peer relationship. R1 imports 2000:: 1/128 to BGR By default, which of the following is the next hop of the route from R2 to 2000:: 1/128?
- A. 2000:12::1
- B. 2003:12::1
- C. 2002: 12:: 1
- D. 2001:12.1
Answer: A
NEW QUESTION # 67
BGP authentication can prevent illegal routers from establishing neighbors with BGP routers. BGP authentication can be divided into ID5 authentication and Keychain authentication. Which of the followingBGP packets will carryBGPKeychain authentication information?
- A. Update
- B. Notification
- C. Open
- D. Keepalive
Answer: C,D
NEW QUESTION # 68
When troubleshooting a network, if you need to confirm the business traffic path, which of the following may need to be done ()
- A. Confirm the network layer service traffic path
- B. Confirm data link layer service traffic path
- C. Investigate service traffic path planning in the network design phase
- D. Confirm the frequency of failure
Answer: A,B,C
NEW QUESTION # 69
On the network shown in the figure, VRRP is configured on Rl and R2, and the virtual IP address is
10.0.12.254. After the configuration is complete, the network engineer checks the VRRP status on R1 and R2, and finds that both devices are in the Master state. Which of the following is not a possible cause of this problem?
- A. GE0/0/1 and GEO/0/2 of SW1 belong to different VLANs.
- B. The virtual IP addresses configured on R1 and R2 are different.
- C. R1 and R2 have different priorities in the VRRP group.
- D. The VRIDs configured on R1 and R2 are different.
Answer: C
NEW QUESTION # 70
On the OSPF network shown in the figure, the cost values of links are marked. OSPF IP FRR is enabled on R1, and the maximum load-balancing 8 command is configured in the OSPF process. If a service passes through the path R1 # R5 # R3 to reach 10.0.3.3/32, which of the following is the backup outbound interface for the service?
- A. GE0/0/3
- B. There is no backup outbound interface.
- C. GE0/0/2
- D. GE0/0/2 and GE0/0/3
Answer: A
Explanation:
Comprehensive and Detailed In-Depth Explanation:
Step 1: Identify the Primary Path
* The shortest OSPF cost to 10.0.3.3/32 from R1 is through R5:
* R1 # R5 (Cost 10) # R3 (Cost 10) = Total Cost 20
* The primary outbound interface from R1 to R5 is GE0/0/1.
Step 2: Identify the Backup Path (OSPF IP FRR & ECMP)
* OSPF IP Fast Reroute (FRR) provides a backup next-hop in case the primary link (R1 # R5) fails.
* A feasible backup path must have a cost equal to or close to the primary path, but it must avoid the same failure point.
Alternative Path Calculation:
* Path 1 (R1 # R2 # R3)
* R1 # R2 (Cost 10), R2 # R3 (Cost 10) # Total Cost = 20 #
* Uses interface GE0/0/2 on R1.
* Path 2 (R1 # R4 # R3)
* R1 # R4 (Cost 10), R4 # R3 (Cost 10) # Total Cost = 20 #
* Uses interface GE0/0/3 on R1.
Final Decision on the Backup Interface
* Since both paths R1 # R2 # R3 and R1 # R4 # R3 have equal costs, either can be used for backup.
* However, R1 # R2 # R3 shares a direct cost path with R5, meaning it may not be preferred as a full FRR backup.
* The best backup outbound interface in this scenario is GE0/0/3 (R1 # R4 # R3).
Final answer: # C (GE0/0/3)
References:
* HCIP-Datacom-Advanced Routing & Switching Technology V1.0 - OSPF IP FRR (Fast Reroute) Mechanism
* OSPF Equal-Cost Multi-Path (ECMP) and Backup Route Selection
* OSPF Route Calculation and Best-Path Selection
NEW QUESTION # 71
The RR rules for advertising routes break the IBGP split horizon rules, so it may cause loops in the AS.
What routing attributes does RR use to prevent loops? (Multiple choice)
- A. Next hop
- B. Cluster List
- C. AS-PATH
- D. Originator ID
Answer: B,D
NEW QUESTION # 72
What is the default aging time of the MAC address table of Huawei switches in seconds?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION # 73
As shown in the figure, in a medium-sized network, BGP generally deploys dual RRs to improve R reliability. When deploying dual RRs, the ClusterIDs of the two RRs are generally set to be the same. What is the reason for this?
- A. prevent suboptimal
- B. Prevent RR from receiving too many routes and causing insufficient memory
- C. prevent loops
- D. Prevent the client from receiving too many routes and causing it to run out of memory
Answer: B
NEW QUESTION # 74
The IS-IS Level-1 neighbor relationship between R3 and R4 is not established. According to the information in this figure_What is the possible reason?
- A. R3andR4the interconnect interfacecircuit-typeMismatch
- B. R3andR4different area codes
- C. R3andR4ofIS-LevelMismatch
- D. R3andR1ofIIHAuthentication failed
Answer: B
NEW QUESTION # 75
On the network shown in the figure, OSPF is deployed on R1 and R2. IS-IS is deployed on R2 and R3. To enable R1 to obtain the route to 10.0.3.3/32, ISIS routes are imported into OSPF on R2. In this case, the next hop address to 10.0.3.3/32 in the routing table of R1 is_____.
Answer:
Explanation:
10.0.23.2
NEW QUESTION # 76
On a stable network that requires fast route convergence, you can change the value of the interval at which OSPF LSAs are updated to 0 so that topology or route changes can be immediately advertised on the network through LSAs, which speeds up route convergence.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION # 77
The OSPF protocol is run between CE and PE, when CE1 advertises the route of its site to CE2. Which of the following descriptions is incorrect?
- A. whenPE2receivePE1sentBGProutedDomain IDcorrect for all when different from localLSA.
PE2will generateType5LSAorType7 LSA - B. PEIconfiguredDomain IDcan be used asBGPThe extended community attribute of is sent with the route toPE2
- C. whenPE2receivePE1sentBGProutedDomain IDWhen the same as local, forTypel LSAandType2LSA. PE2will generateType3 LSA
- D. whenPE2receivePEIsentBGProutedDomain IDSame as local forType3 LSA.
PE2will generateType5 LSA
Answer: D
NEW QUESTION # 78
A router LSA is shown in the figure. Which of the following statement is wrong?
- A. The Router ID of this router is 10.0.12.1
- B. The router has established adjacency
- C. This router is DR
- D. This router supports the import of external routes
Answer: C
NEW QUESTION # 79
In the multi-level RR scenario, a large number of secondary RRs will be connected to the primary RR, which may lead to BGP of the primary RR. The routing table overflows, what method can be used to reduce the risk of overflowing the routing table of the advanced RR BGP?
- A. ORF
- B. routing control
- C. route aggregation
- D. set the sameCluster-ID
Answer: C
NEW QUESTION # 80
According to this picture, cooked I'] can be judged?
- A. R1ofGE0/0/1Interface is not enabledIS-IS IPv6
- B. R1ofGE0/0/1interfaceIS-ISThe interface type isLeve-1
- C. R1ofGEO/O/OinterfaceIS-ISThe interface type isLevel-1-2
- D. R1ofGEO/O/Ointerface is enabledIS-IS IPv6
Answer: C,D
NEW QUESTION # 81
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?
Options:
- A. An OSPF neighbor relationship can be established between R1 and R3.
- B. An OSPF neighbor relationship can be established between R2 and R4.
- C. An OSPF neighbor relationship can be established between R3 and R4.
- D. The OSPF neighbor relationship between R1 and R2 is not affected.
Answer: C,D
Explanation:
Comprehensive and Detailed In-Depth Explanation:
1. Understanding OSPF Neighbor Relationships
* OSPF (Open Shortest Path First) forms neighbor relationships based on these key conditions:
* Routers must be in the same OSPF area.
* The subnet mask and network type must match.
* The Hello/Dead timers must match.
* Authentication (if enabled) must match.
2. Analyzing the Given Scenario
* R1 and R2 are in Area 0 (Backbone Area).
* R3 and R4 are in Area 1 (Non-Backbone Area).
* R4 was configured incorrectly using R3's backup configuration, which could cause issues.
3. Evaluating Each Answer Option
* Option A: "The OSPF neighbor relationship between R1 and R2 is not affected."
* Correct.
* R1 and R2 are both in Area 0 and their configuration was not changed.
* Since R4 was added only between R2 and R3, it does not impact R1 and R2.
* # A is correct.
* Option B: "An OSPF neighbor relationship can be established between R2 and R4."
* Incorrect.
* R2 is in Area 0, but R4 is incorrectly configured using R3's backup, which likely placed it in Area 1.
* OSPF neighbors cannot form across different areas unless an Area Border Router (ABR) is properly configured.
* Since there is no indication of an ABR setup, the adjacency will fail.
* # B is incorrect.
* Option C: "An OSPF neighbor relationship can be established between R3 and R4."
* Correct.
* R3 and R4 are both in Area 1, and R4's backup configuration comes from R3, meaning they likely have identical settings.
* Since they share the same area and are directly connected, an OSPF adjacency is possible.
* # C is correct.
* Option D: "An OSPF neighbor relationship can be established between R1 and R3."
* Incorrect.
* R1 is in Area 0, and R3 is in Area 1.
* OSPF does not form neighbor relationships between different areas unless configured as an ABR, which is not mentioned.
* # D is incorrect.
Final Answer:
# A and C are correct.
HCIP-Datacom-Advanced Routing & Switching Technology References:
* OSPF Neighbor Formation and Area Design Principles
* Troubleshooting OSPF Area Mismatches and Configuration Issues
* OSPF Backbone Area (Area 0) and Inter-Area Communication
NEW QUESTION # 82
When encountering network failures, engineers often use layered failure handling methods. Because all models follow the same basic premise, when all the low-level structures of the model work normally, its high-level structures can work normally. Please match the following check items with the corresponding level according to the tiered method.
1. Is the TCP connection established correctly?
2. Whether the port opens the interface protocol
3. Whether the Layer 2 addressing is normal, whether the physical status of the interface is UP, and whether the cables and connectors are normal
4. Is the routing protocol working properly?
Answer:
Explanation:
1. Transport layer
2. Data link layer
3. Physical layer
4. Network layer
NEW QUESTION # 83
As shown in the figure, the network has caused a loop because STP is not enabled. Which of the following phenomena may be caused? (Multiple choice)
- A. The device will have a loop alarm
- B. A large number of broadcasts can be received on the Host
- C. MAC address table flapping
- D. The device CPU usage is too high
Answer: A,B,C,D
NEW QUESTION # 84
The figure shows the LSP information of R1 and R3 on an MPLS network. An administrator runs the ping -a 1.1.1.1 3.3.3.3 command on R1. Given this, which of the following statements is true?
- A. The Echo Request packet received by R2 carries label 1025, and the Echo Reply packet received by R2 carries label 1024.
- B. The Echo Request packet received by R2 carries label 1025, and the Echo Reply packet received by R2 does not carry any label.
- C. Both the Echo Request and Echo Reply packets received by R2 do not carry any label.
- D. The Echo Request packet received by R2 does not carry any label, and the Echo Reply packet received by R2 carries label 1024.
Answer: B
NEW QUESTION # 85
......
The HCIP-Datacom-Advanced Routing & Switching Technology V1.0 certification program equips the professionals with the knowledge and skills required to design, configure, and implement advanced routing protocols in large-scale networks. H12-831_V1.0-ENU course covers topics such as OSPF, IS-IS, and BGP routing protocols, load balancing, path selection, and policy-based routing. The professionals who complete the HCIP-Datacom-Advanced Routing program acquire a comprehensive understanding of advanced routing concepts and are able to apply them in practical scenarios.
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