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Huawei H12-831_V1.0 Exam Questions
- Huawei Certified ICT Professional HCIP Certifications
- Huawei HCIP Datacom Certifications
- Huawei HCIP Routing & Switching Certifications
- Topic 1: Advanced IGP Features: IT professionals preparing for the Huawei H12-831_V1.0 exam must master advanced interior gateway protocols like OSPF and IS-IS for fast convergence, route control, and efficiency.
- Topic 2: Advanced BGP Features: The HCIP-Datacom-Advanced Routing & Switching Technology V1.0 exam tests IT professionals on BGP, focusing on route control, route reflectors, and advanced BGP features to ensure efficient inter-domain routing.
- Topic 3: IPv6 Routing: IPv6 transition is crucial, and the Huawei Certified ICT Professional exam covers static routes, IS-IS for IPv6, OSPFv3, and BGP4+.
- Topic 4: Advanced Ethernet Technologies: This topic gives an understanding of VLANs and Ethernet security that is essential for Huawei Certified ICT Professional candidates to design and maintain secure, efficient Ethernet networks, crucial for modern data centers.
- Topic 5: MPLS Technologies: MPLS is a key topic in the HCIP-Datacom-Advanced Routing & Switching Technology V1.0 exam, covering principles, forwarding, configuration, and VPN applications.
- Topic 6: Network O&M: The H12-831_V1.0 test includes O&M, focusing on maintaining and troubleshooting networks through routine maintenance and data collection.
- Topic 7: Troubleshooting: Troubleshooting skills are essential for the Huawei Certified ICT Professional exam candidates. This topic focuses structured processes and various methods to resolve network issues effectively.
- Topic 8: Network Cutover: This topic includes basic cutover concepts and the migration process. Both are crucial for successful network transitions.
Free Huawei H12-831_V1.0 Exam Actual Questions
Note: Premium Questions for H12-831_V1.0 were last updated On Mar. 06, 2026 (see below)
On the IS-IS IPv6 network shown in the figure:
Multi-topology is enabled on all routers.
The IPv6 address of Loopback0 on R4 is 2000::4/128.
The command ipv6 summary 2000::/64 level-2 is configured in the IS-IS processes of R2 and R1.
The command ipv6 import-route isis level-2 into level-1 is configured in the IS-IS processes of R1, R2, and R3.
Which of the following routers have the route 2000::/64 in their routing tables?
Comprehensive and Detailed In-Depth
Understanding the IS-IS Network and IPv6 Route Summary Behavior
IS-IS Areas and Router Roles:
Area 49.0001 (Level-1-2): R1, R2, R4
Area 49.0002 (Level-1-2 & Level-1): R3 (Level-1-2), R5 (Level-1 only)
Effect of ipv6 summary 2000::/64 level-2 Command
This command on R1 and R2 summarizes the 2000::/64 prefix for Level-2 routers.
Instead of advertising the detailed 2000::4/128 prefix, R1 and R2 advertise only the summarized 2000::/64 route to other Level-2 routers.
Effect of ipv6 import-route isis level-2 into level-1 Command
This command allows Level-1 routers (like R3) to learn Level-2 routes (like 2000::/64).
R1 and R2 redistribute the 2000::/64 summary route into Level-1 IS-IS areas, making it available to Level-1 routers.
Route Distribution Analysis for Each Router
R4 (Does Not Have 2000::/64)
R4 only advertises its Loopback0 (2000::4/128).
It does not need to install the summarized 2000::/64 route, as it originates from its own loopback.
R4 does NOT have the 2000::/64 route.
R5 (Does Not Have 2000::/64)
R5 is a Level-1-only router in Area 49.0002.
It does not have a Level-2 connection to learn the summarized 2000::/64 route.
Because R5 is Level-1 only, it can only receive routes if a default route is provided, which is not mentioned in the question.
R5 does NOT have the 2000::/64 route.
R3 (Has 2000::/64)
R3 is a Level-1-2 router, meaning it can learn both Level-1 and Level-2 routes.
Since R1 and R2 advertise the summarized 2000::/64 route into Level-2 and R3 has ipv6 import-route isis level-2 into level-1, R3 will install 2000::/64 in its routing table.
R3 has the 2000::/64 route.
R2 (Has 2000::/64)
R2 is a Level-1-2 router and has the ipv6 summary 2000::/64 level-2 command enabled.
This means R2 advertises the summarized 2000::/64 route to other Level-2 routers and installs it in its own routing table.
R2 has the 2000::/64 route.
Final Conclusion:
R3 has the route 2000::/64.
R2 has the route 2000::/64.
R4 does NOT have the route 2000::/64.
R5 does NOT have the route 2000::/64.
Thus, the correct answers are: C. R3, D. R2.
HCIP-Datacom-Advanced Routing & Switching Technology V1.0 -- IS-IS Route Summarization and IPv6 Multi-Topology
Huawei Official HCIP-Datacom Study Guide -- IS-IS L1/L2 Routing and IPv6 Summarization Commands
Huawei Documentation on IPv6 Route Summary Behavior in IS-IS
On the OSPFv3 network shown in the figure, area 1 is a stub area.
Which of the following LSAs is generated by only one router?
A. Inter-Area-Prefix-LSA B. Link-LSA C. Network-LSA D. Intra-Area-Prefix-LSA
Comprehensive and Detailed In-Depth
Understanding OSPFv3 LSA Types
OSPFv3 uses different LSA types than OSPFv2, with some being similar in function:
Link-LSA (Type 8): Generated by every router on a link to advertise link-local IPv6 information.
Intra-Area-Prefix-LSA (Type 9): Advertises IPv6 prefixes within an area.
Network-LSA (Type 2): Generated only by the Designated Router (DR) to advertise information about all routers on a multi-access network.
Inter-Area-Prefix-LSA (Type 3): Advertises network prefixes between OSPF areas (generated by ABRs).
Route Distribution Analysis:
HCIP-Datacom-Advanced Routing & Switching Technology V1.0 -- OSPFv3 LSA Types and Multi-Area Behavior
Huawei Official HCIP-Datacom Study Guide -- OSPFv3 Stub Areas and LSA Advertisements
Huawei Documentation on OSPFv3 DR/BDR Roles and LSA Generation
After port isolation is configured on a switch, hosts in the same VLAN cannot communicate with each other at Layer 2 or Layer 3 by default.
On an enterprise network shown in the figure, if CE2 is dual-homed to PE2 and PE3, a routing loop may occur during the exchange of Type 5 LSAs (External LSAs in OSPF).
To prevent the loop, the route-tag command can be run on PE2 and PE3.
In this way, if the route tag of the route received by PE3 is the same as that configured locally, the route is ignored.
Is this statement True or False?
Comprehensive and Detailed In-Depth
1. Understanding the Issue of OSPF Type 5 LSAs in a Dual-Homed CE Scenario
OSPF Type 5 LSAs (External LSAs) are used in OSPF to advertise external routes, such as those learned via BGP or redistributed from another protocol.
In a dual-homed CE setup, like the one in the figure, CE2 connects to both PE2 and PE3 using OSPF.
PE2 and PE3 both redistribute BGP routes into OSPF and advertise them to CE2.
CE2 then forwards these LSAs between PE2 and PE3, potentially causing a routing loop because each PE may re-learn its own previously advertised routes.
2. How Route Tags Prevent Loops in OSPF-BGP Redistribution
The route-tag command assigns a tag to redistributed routes.
When a router receives an external OSPF LSA (Type 5), it checks the route tag.
If the route tag matches the locally configured tag, the router ignores the route to prevent loops.
Example Configuration on PE Routers:
plaintext
CopyEdit
PE2:
router ospf 1
import-route bgp 100 route-tag 65001
PE3:
router ospf 1
import-route bgp 100 route-tag 65001
Both PE2 and PE3 tag their redistributed BGP routes with 65001.
If PE3 receives an LSA from CE2 with the tag 65001, it ignores it (because it knows it originally advertised it).
This prevents OSPF from incorrectly preferring a route that was originally sourced from itself, avoiding routing loops.
3. Evaluating the Answer Choices
TRUE: If the route tag of the received route matches the locally configured tag, the route is ignored, preventing loops.
FALSE: The statement is correct, so False is incorrect.
Thus, the correct answer is: A. TRUE
Final Conclusion:
The statement is TRUE because route tagging is a valid method to prevent OSPF Type 5 LSA loops in dual-homed scenarios.
HCIP-Datacom-Advanced Routing & Switching Technology V1.0 -- OSPF Route Redistribution and Route-Tagging
Huawei Official HCIP-Datacom Study Guide -- Preventing OSPF-BGP Loops in MPLS VPNs
Huawei Documentation on Using Route Tags to Prevent OSPF Routing Loops
On the OSPF network shown in the figure, a network engineer finds that R1 and R2 have the same router ID, and both have imported default routes (with the default-route-advertise always command configured). Given this, which of the following statements is false?
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