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Huawei HCIP-Datacom-Advanced Routing & Switching Technology V1.0 : H12-831_V1.0-ENU
Exam Code: H12-831_V1.0-ENU
Exam Name: HCIP-Datacom-Advanced Routing & Switching Technology V1.0
Updated: Sep 12, 2026
Q & A: 211 Questions and Answers
H12-831_V1.0-ENU Free Demo download
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Huawei H12-831_V1.0-ENU Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Network Troubleshooting | 10% | - Structured troubleshooting processes - Troubleshooting methods |
| Network O&M | 7% | - Routine maintenance - Data collection |
| Advanced Ethernet Technologies | 10% | - VLANs - Ethernet security |
| IPv6 Routing | 20% | - IS-IS for IPv6 - OSPFv3 - IPv6 static routes - BGP4+ |
| Advanced IGP Features | 17% | - Fast convergence - IS-IS advanced features - OSPF advanced features - Route control |
| Advanced BGP Features | 10% | - BGP route control - Inter-domain routing optimization - Route reflectors - Advanced BGP features |
| Network Cutover | 7% | - Basic cutover concepts - Migration process |
| MPLS Technologies | 19% | - MPLS VPN applications - MPLS configuration - MPLS principles - MPLS forwarding |
Huawei HCIP-Datacom-Advanced Routing & Switching Technology V1.0 Sample Questions:
Question #1
In the hub-spoke networking shown in the figure, to ensure correct route transmission , an administrator must manually configure the peer 10.1.2.1 _____ command in the IPv4 address family view of the BGP- VPN_out instance on the Hub-PE .
( Enter the answer in lowercase letters only. )
Correct Answer:
next-hop-self
Explanation:
To determine the correct command, we need to analyze BGP behavior in a Hub-Spoke topology and how routes are advertised in MPLS VPN environments .
1. Understanding the Hub-Spoke BGP/MPLS VPN Topology
* The network consists of Hub-PE and Spoke-PE routers , which are MPLS VPN PEs .
* Hub-PE is responsible for distributing routes between Spoke-PE1 and Spoke-PE2 .
* Spoke routers do not have direct IBGP peering with each other ; instead, they rely on the Hub-PE to relay routes .
* BGP next-hop handling is critical for proper route advertisement .
2. Why is the " next-hop-self " Command Required?
* By default, when BGP advertises a route , the next-hop remains unchanged (i.e., the original next- hop is retained).
* In Hub-Spoke topology , Spoke routers would receive routes with a next-hop IP that belongs to another Spoke-PE , which is not reachable directly .
* To solve this issue, we use the next-hop-self command on the Hub-PE , so that:
* Hub-PE updates the next-hop to its own address before advertising routes to the Spoke-PEs.
* This ensures that Spoke-PE routers use the Hub-PE as the next-hop , making routes reachable and preventing blackholing .
3. Correct Command Usage
The administrator must run the following command under the BGP IPv4 address family of the BGP- VPN_out instance on Hub-PE :
shell
CopyEdit
peer 10.1.2.1 next-hop-self
This ensures that the next-hop for advertised routes is changed to the Hub-PE ' s IP , allowing proper route transmission in the Hub-Spoke MPLS VPN environment .
Question #2
On the OSPF network shown in the figure, drag the values on the left to the correct positions so that the traffic from PC1 to PC2 is sent along the path PC1 # R1 # R3 # R2 # PC2, and the traffic from PC2 to PC1 is sent along the path PC2 # R2 # R1 # PC1.
Correct Answer:
Explanation:
# Objective:
* Asymmetric routing via OSPF cost manipulation
* PC1 to PC2 must go through: R1 # R3 # R2
* PC2 to PC1 must go through: R2 # R1
# Step-by-Step Cost Logic:
* Path PC1 # R1 # R2 (direct path) must be less preferred than PC1 # R1 # R3 # R2 # Therefore, make Cost A (R1-R2) high (least preferred) # Set A = 50
* Path PC1 # R1 # R3 # R2 should be preferred # Cost = C (R1 - R3) + 10 (R3 - R2) # Set C = 30 , so total = 30 + 10 = 40 , which is less than 50
* From PC2 to PC1 , we want to use R2 # R1 # So R2 must see R1 as best next-hop to PC1 # Ensure B (R2 - R3) + C is higher than A # Set B = 10 , so B + C = 10 + 30 = 40, which is more than A = 50 only if C were higher (which it isn't), but in reverse direction it's fine because R2 will still prefer direct
10 over B + 10 = 40.
# Final Answer Summary:
Label
Value
A
50
B
10
C
30
Official Huawei Extract:
" In OSPF, routing decisions are made based on cost. By manipulating interface costs, you can influence directional path selection (asymmetric routing). Lower total cost equals higher preference. "
- [Huawei HCIA-Datacom Certification Guide - OSPF Cost and Path Selection]
Question #3
On the OSPF network shown in the figure, area 1 and area 2 are common areas . The IP address of Loopback0 on R5 is 10.0.5.5/32 , and OSPF is enabled on this interface . If the abr-summary 10.0.5.0
255.255.255.0 command is run in area 2 (where R1 resides) , which of the following routers have the route
10.0.5.0/24 in their routing tables?
- A. R3
- B. R2
- C. R5
- D. R4
Correct Answer: A,B 🗳️
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Question #4
On the network shown in the figure, R1 and R2 cannot establish an EBGP peer relationship through directly connected interfaces. To locate this fault, a network engineer checks BGP configurations on R1 and R2, as shown in the figure. Based on these configurations, it can be determined that the fault cause is the inconsistent router IDs and interface IP addresses.
- A. FALSE
- B. TRUE
Correct Answer: A 🗳️
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Question #5
On the OSPF network shown in the figure, area 1 is an NSSA, area 2 is a common area, and R4 imports an external route 10.0.4.4/32 . The router ID of each router is 10.0.X.X, where X is the router number . If the asbr-summary 10.0.4.0 255.255.255.0 command is run in the OSPF processes of R1 and R3 , which of the following routers have the route 10.0.4.0/24 in their routing tables?
- A. R1
- B. R3
- C. R2
- D. R5
Correct Answer: A,B 🗳️
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