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| Certification Vendor: | Huawei |
|---|---|
| Exam Name: | HCIP-Datacom-Advanced Routing & Switching Technology V1.0 |
| Exam Number: | H12-831_V1.0 |
| Exam Duration: | 90 minutes |
| Certificate Validity Period: | 3 years |
| Exam Format: | True/False, Single choice, Multiple choice |
| Passing Score: | 600/1000 |
| Available Languages: | English, Chinese |
| Exam Price: | USD 200 (varies by region) |
| Related Certifications: | HCIA-Datacom HCIE-Datacom HCIP-Datacom-Core Technology |
| Real Exam Qty: | 60 |
| 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 certification exam is designed for advanced networking professionals who want to validate their knowledge of datacom routing and switching technologies. HCIP-Datacom-Advanced Routing & Switching Technology V1.0 certification is an excellent choice for individuals seeking to enhance their skills in the field of networking and wish to work with Huawei products. H12-831_V1.0 Exam covers advanced topics related to datacom routing and switching, which includes the design and implementation of complex networks.
NEW QUESTION # 178
What check items can be set by IPSG?
Answer: A,B,C,D
NEW QUESTION # 179
EGP authentication can prevent illegal routers from establishing neighbors with BCP routers. BCP authentication can be divided into MD5 authentication and Keychain authentication. Which of the following BGP messages will carry BCGP Keychain authentication information? ((Multiple choice)
Answer: A,B,C,D
NEW QUESTION # 180
On the network shown in the figure, IS-IS IPv6 runs on R2, R6, and R3, and the IPv6 address of Loopback0 on R6 is 2000::6/128. OSPFv3 runs on other links. Area 1 is a common area, and area 2 is an NSSA. IS-IS routes are imported to OSPFv3 on R2 and R3. Which of the following statements are true?
Answer: A,B,C
Explanation:
# Topology Breakdown:
* IS-IS IPv6 is running between R2, R3, and R6.
* R6's loopback0 address is 2000::6/128.
* R6 is in Area 2, which is an NSSA, and R2/R3 are Level-1-2 routers.
* OSPFv3 runs in other parts of the network (R1, R4, R5).
* IS-IS IPv6 routes are being redistributed into OSPFv3 by R2 and R3.
# Option A: The routing table of R1 contains the route 2000::6/128.
# True
* R3 redistributes IS-IS into OSPFv3.
* R3 is connected to Area 0, so the route reaches R1 via normal OSPFv3 inter-area routing.
# Option B: The routing table of R6 contains the route ::/0.
# False
* Area 2 is an NSSA, which does not receive Type-5 external LSAs by default.
* R6 is in the IS-IS domain only and is not part of the OSPFv3 backbone.
* Unless a default route (default-information originate) is configured in redistribution from OSPFv3 to IS- IS (not stated), R6 will not have ::/0.
# Option C: The routing table of R4 contains the route 2000::6/128.
# True
* R2 is a Level-1-2 router and redistributes IS-IS routes into OSPFv3.
* Area 1 is a normal/common OSPF area, so R4 receives the route from R2 via OSPFv3 Type-5 or Type-
3 LSAs.
# Option D: The routing table of R5 contains the route 2000::6/128.
# True
* R3 redistributes IS-IS into OSPFv3 in Area 2 (which is NSSA).
* OSPFv3 uses Type-7 LSAs in NSSA, which are converted into Type-5 LSAs by the NSSA ABR (R3).
* R5 is in Area 2 and will receive the Type-7 LSA directly or the Type-5 LSA after conversion, so it can learn the 2000::6/128 route.
# Final Answer: A, C, D
Official Huawei Extract:
" When IS-IS routes are imported into OSPFv3, they are advertised as external routes using Type-5 LSAs in standard areas, and as Type-7 LSAs in NSSAs. NSSA ABRs convert Type-7 LSAs into Type-5 LSAs for propagation into other areas. "
" Common areas can receive redistributed external routes, and routing propagation from IS-IS into OSPFv3 is supported via import-route. "
- [Huawei HCIA-Datacom Certification Guide - IPv6, IS-IS, and OSPFv3 Redistribution Sections]
NEW QUESTION # 181
A network device has established an OSPF neighbor relationship with another device. The figure shows the configuration of GE0/0/0 on the network device.
Which of the following commands would NOT affect the OSPF neighbor status of the interface?
Answer: D
Explanation:
Comprehensive and Detailed In-Depth Explanation:
To determine the correct answer, we need to analyze how each command impacts OSPF neighbor relationships.
1. Understanding OSPF Neighbor Formation
OSPF routers form neighbor relationships when they meet the following conditions:
* They are in the same subnet (IP addresses and subnet masks must match).
* They are in the same OSPF area.
* They use the same network type (e.g., Broadcast, Point-to-Point).
* Authentication (if configured) must match.
* Hello and Dead timers must match.
2. Analyzing Each Answer Option
# A. " undo ip address 10.0.12.2 24 " # Affects OSPF Neighbor Status
* Removing the IP address will prevent the interface from sending and receiving OSPF Hello packets.
* Without an IP address, OSPF cannot establish neighbor relationships.
* Effect: Breaks OSPF neighbor status.
# B. " undo description " # Does NOT Affect OSPF Neighbor Status
* The interface description is just a label for administrators and has no impact on OSPF functionality.
* It does not affect neighbor relationships, routing, or communication.
* Effect: No impact on OSPF neighbors.
# C. " undo ospf cost " # Affects OSPF Neighbor Status Indirectly
* OSPF cost determines the path selection but does NOT break the neighbor relationship.
* However, if the cost change leads to routing table recalculations, it might cause temporary convergence issues.
* Effect: Does not directly break neighbor status, but affects route selection.
# D. " undo ospf dr-priority " # Affects OSPF Neighbor Status (Possibly Causes DR Re-Election)
* OSPF DR/BDR election uses priority values.
* If changed, a new election might occur, leading to a temporary loss of neighbor relationships.
* Effect: Might cause OSPF neighbor reset (temporary impact on adjacency).
NEW QUESTION # 182
On an enterprise network shown in the figure, EBGP is deployed between CEs and PEs .
CE1 sends a VPN route to PE1.
Which of the following statements are false?
Options:
Answer: A,B
Explanation:
Comprehensive and Detailed In-Depth Explanation:
1. Understanding Site of Origin (SoO) in MPLS VPNs
* SoO (Site of Origin) is used in MPLS VPNs to prevent loops in multi-homed CE scenarios.
* Routes with the same SoO value are not advertised back to the same site.
2. Analysis of Each Answer Choice
A). " To enable CE3 to receive the route, run the command peer 10.1.1.1 soo 200:1 on PE1. " ( # False)
* SoO is used to prevent loops by tagging routes that belong to the same site.
* Applying SoO (200:1) on PE1 for CE1 means that any other PE (such as PE2) receiving the route will not advertise it back to the same site (CE1).
* This statement is false because applying SoO here does not directly enable CE3 to receive the route. Instead, CE3 must accept routes with SoO values properly configured.
B). " If the commands peer 10.1.1.1 soo 200:1 and peer 10.1.2.1 soo 200:1 are run on PE1, CE2 accepts the route. " ( # False)
* SoO ensures that a route received from one CE is not sent back to another CE in the same site.
* If SoO (200:1) is assigned to CE1 and CE2, routes will be blocked because they share the same SoO tag.
* Thus, CE2 will not accept the route, making this statement false.
C). " If the command peer 10.1.3.1 substitute-as is run on PE2, CE3 accepts the route. " ( # True)
* substitute-as allows a router to replace the received AS number in the AS_PATH with another AS number, ensuring that routes are accepted even when AS_PATH filtering is in place.
* This prevents CE3 from rejecting the route due to AS-Path loop prevention.
* # Thus, this statement is true.
D). " If no additional action is taken, CE3 discards the route. " ( # True)
* By default, CE3 will discard the route because of BGP loop prevention (same AS in the AS_PATH).
* To allow CE3 to receive the route, the allowas-in or substitute-as command must be configured on PE2.
* # Thus, this statement is true.
3. Evaluating the Answer Choices
Option
Correct?
Reasoning
A
# False
Applying SoO does not directly enable CE3 to receive the route.
B
# False
If both CE1 and CE2 have the same SoO value, CE2 will reject the route.
C
# True
Substitute-AS allows CE3 to accept the route by modifying the AS-Path.
D
# True
Without additional configuration, CE3 will discard the route due to AS-Path loop prevention.
# Correct answer: A and B are false.
Final Conclusion:
* SoO prevents routing loops in MPLS VPN multi-homing.
* CE2 will reject the route if it has the same SoO as CE1.
* CE3 requires the substitute-as or allowas-in command to accept the route.
* Thus, statements A and B are false.
Reference:
HCIP-Datacom-Advanced Routing & Switching Technology V1.0 - BGP SoO and AS-Path Loop Prevention Huawei Official HCIP-Datacom Study Guide - MPLS VPN Route Control Huawei Documentation on BGP SoO and AS_PATH Filtering
NEW QUESTION # 183
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