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Huawei H12-831_V1.0 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Advanced BGP Features | 10% | - Route reflectors and confederations - Routing policies and filtering - BGP multi-homing and load balancing - BGP route selection and attributes |
| Advanced IGP Features | 17% | - IS-IS advanced features
|
| Advanced Ethernet Technologies | 10% | - Ethernet link aggregation and reliability - Port isolation and security features - QinQ and VLAN mapping - VLAN aggregation and MUX VLAN |
| Network Cutover | 7% | - Implementation and rollback strategy - Cutover planning and risk assessment - Pre-cutover verification - Post-cutover validation |
| MPLS Technologies | 19% | - MPLS OAM and protection - LDP and RSVP-TE protocols - MPLS fundamentals and label distribution - MPLS VPN (L3VPN, L2VPN) |
| Network Troubleshooting | 10% | - Structured troubleshooting methodology - Switching and link fault handling - Routing protocol fault diagnosis - Performance and service fault resolution |
| Network O&M | 7% | - Network monitoring and performance analysis - Log and alarm management - Routine maintenance procedures - Configuration management and backup |
| IPv6 Routing | 20% | - OSPFv3 and IS-IS for IPv6 - BGP4+ for IPv6 - IPv6 address planning and configuration - Transition mechanisms (dual-stack, tunnel, translation) |
Huawei HCIP-Datacom-Advanced Routing & Switching Technology V1.0 Sample Questions:
If the display ospfv3 peer verbose command is run to check OSPFv3 neighbor information, the command output contains information such as the peer router ID, global unicast address of the peer interface, and neighbor status.
- A. FALSE
- B. TRUE
Correct Answer: B 🗳️
When a fault occurs on an OSPF network, traffic can be switched to another path only after several phases. Sort these phases in the correct sequence.
Correct Answer:
Explanation:
When OSPF detects a failure in the network, it performs a series of actions to ensure traffic is rerouted to a valid path. The phases occur in this strict order:
* # Fault Detection (A)
* OSPF routers use Hello packets to maintain neighbor relationships.
* If a Hello timeout or link down is detected, the fault is immediately recognized.
* # LSA Update (B)
* Upon detecting a failure, the router generates a new LSA (e.g., a Router-LSA or Network-LSA) and floods it to all other routers in the same area.
* This LSA communicates the change in network topology.
* # Route Calculation (C)
* Each router that receives the updated LSAs runs the SPF algorithm to recompute the best path to every destination.
* # Entry Delivery to the FIB (D)
* After recalculating the routes, the router installs the new forwarding entries into the FIB (Forwarding Information Base) , allowing data to be forwarded along the new optimal path.
# Official Huawei Reference:
" OSPF convergence after a network failure consists of fault detection, LSA flooding, SPF calculation, and updating the FIB. Each step must be completed for traffic to resume correctly on alternate paths. "
- [Huawei HCIA-Datacom Certification Guide - Chapter: OSPF Convergence and SPF Algorithm]
OSPF requires that routers in the same area have the same link state database (LSDB). As the number of routes on the network increases, some routers cannot carry so much routing information due to limited system resources. This state is called database overflow. If the Isdb-overflow-limit number 7 command is run on all routers on an OSPF network, which of the following conditions are likely to cause routers to enter the overflow state?
- A. The number of Type 7 LSAs exceeds 7.
- B. The number of Type 4 LSAs exceeds 7.
- C. The number of Type 5 LSAs exceeds 7.
- D. The number of Type 3 LSAs exceeds 7.
Correct Answer: C 🗳️
In the hub-spoke networking shown in the figure, the Hub-PE can be configured to allow repetitive local AS numbers for correct route transmission.
- A. FALSE
- B. TRUE
Correct Answer: B 🗳️
On the network shown in the figure, PC1 and PC2 are connected to the same switch (SW1) and belong to the same VLAN .
Which of the following are possible causes of a communication failure between PC1 and PC2?
Options:
- A. Port isolation is configured on SW1.
- B. SW1's GE0/0/2 is shut down.
- C. Incorrect static ARP entries are configured on the hosts.
- D. The link of SW1's GE0/0/1 is faulty.
Correct Answer: A,B,C,D 🗳️
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