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Huawei H12-831_V1.0-ENU (HCIP-Datacom-Advanced Routing & Switching Technology V1.0) Certification Exam is designed to test the advanced skills and knowledge of IT professionals in the field of data communication. HCIP-Datacom-Advanced Routing & Switching Technology V1.0 certification exam is a prestigious validation of a candidate's ability to design, implement, and troubleshoot complex data communication networks. It is an intermediate-level exam that will assess the practical knowledge of IT professionals in configuring and managing advanced data communication solutions.
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The Huawei H12-831_V1.0 exam consists of multiple-choice questions and is conducted online. The duration of the exam is 90 minutes, and candidates must achieve a minimum score of 600 out of 1000 to pass. H12-831_V1.0 exam is available in both English and Chinese languages.
Huawei H12-831_V1.0-ENU exam is a comprehensive certification exam that tests the knowledge and skills of IT professionals in advanced routing and switching technologies. H12-831_V1.0 Exam is designed to assess the candidate's understanding of network architecture, network security, routing protocols, and switching technologies. H12-831_V1.0 exam also tests the candidate's ability to design, implement, and maintain complex networks.
NEW QUESTION # 53
When a fault occurs, the fault can be classified to reduce the scope of fault location. Which of the following is not an interface configuration fault?
Answer: A
NEW QUESTION # 54
If the display current-configuration can reach the IS-IS configuration, but there is no IS-IS configuration in the display saved-configuration, what does it mean?
Answer: C
NEW QUESTION # 55
In the hub-spoke networking shown in the figure, which of the following commands must be configured on the Hub-PE to ensure correct route transmission?
Answer: D
Explanation:
Comprehensive and Detailed In-Depth Explanation:
1. Understanding the Hub-Spoke Network Model in MPLS VPN
* Hub-Spoke (or Route Reflector) topology is used in MPLS Layer 3 VPNs where multiple spoke sites communicate through a central hub.
* The Hub-PE acts as an intermediate BGP speaker and redistributes routes between spokes.
* The challenge is preventing routing loops when exchanging routes between spokes.
2. Understanding the Role of Site of Origin (SoO) in BGP/MPLS VPNs
* BGP Site of Origin (SoO) is a route attribute used to prevent routing loops in scenarios where a hub redistributes routes between spokes.
* If a route originating from a spoke is advertised back to the same site, SoO prevents it from being re-learned.
* The SoO value (e.g., 200:1) ensures that a site does not accept its own previously advertised prefixes.
3. Analyzing the Answer Choices
# A. [Hub-PE-bgp-VPN_out] peer x.x.x.x allow-as-loop (Incorrect)
* The allow-as-loop command allows BGP to accept routes with its own AS number in the AS path.
* This is NOT needed in a Hub-Spoke VPN because BGP routes are not being looped through the same AS.
# This is unnecessary for preventing loops in a Hub-Spoke VPN.
# B. [Hub-PE-bgp-VPN_in] peer x.x.x.x allow-as-loop (Incorrect)
* Again, allow-as-loop is used when a router needs to accept its own AS number in the BGP AS path.
* This is NOT the mechanism used for preventing loops in Hub-Spoke VPNs; SoO is used instead.
# This is not required in this scenario.
# C. [Hub-PE-bgp-VPN_in] peer x.x.x.x soo 200:1 (Correct Answer)
* The correct way to prevent spoke routes from looping through the hub is to apply the Site of Origin (SoO) attribute.
* This command ensures that if a route with SoO 200:1 is received, it is not advertised back to the same spoke.
# This is the correct answer.
# D. [Hub-PE-bgp-VPN_out] peer x.x.x.x soo 200:1 (Incorrect)
* Applying SoO on outgoing routes is NOT effective because the hub should mark received routes and prevent loops when re-advertising them.
* SoO should be applied on the inbound (received) routes at the Hub-PE, not outbound.
# This is not the correct implementation of SoO.
Final Conclusion:
# Correct answer: C. [Hub-PE-bgp-VPN_in] peer x.x.x.x soo 200:1
# A. allow-as-loop is unnecessary in a Hub-Spoke MPLS VPN.
# B. allow-as-loop is not relevant here.
# D. SoO should be applied inbound, not outbound.
Thus, the correct answer is: C. [Hub-PE-bgp-VPN_in] peer x.x.x.x soo 200:1 .
Reference:
HCIP-Datacom-Advanced Routing & Switching Technology V1.0 - MPLS VPN Hub-Spoke Design and SoO Configuration Huawei Official HCIP-Datacom Study Guide - Route Loop Prevention in Hub-Spoke VPNs Huawei Documentation on Site of Origin (SoO) in MPLS VPN
NEW QUESTION # 56
As shown in the figure, network administrator A on the R1 router, after modifying the MED value of the routing entry sent to R2 through the routing policy, can control the path of traffic entering AS100.
Answer: B
NEW QUESTION # 57
Compared with the OSPFv2 message header, what fields are added in the OSPFv3 message header?
Answer: A
NEW QUESTION # 58
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