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Huawei H12-831_V1.0-ENU Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Advanced Routing Protocols | - OSPF Advanced Concepts
|
| Network Design and Troubleshooting | - Enterprise network design
|
| IPv6 and Network Services | - IPv6 routing technologies
|
| MPLS and VPN Technologies | - VPN technologies
|
| BGP and Internet Routing | - BGP fundamentals
|
Huawei HCIP-Datacom-Advanced Routing & Switching Technology V1.0 Sample Questions:
On the IS-IS IPv6 network shown in the figure, multi-topology is enabled on all routers. The ipv6 default- route-advertise always level-1 command is configured in the IS-IS processes of R4 and R5. By default, which of the following routers have default routes in their routing tables?
- A. R2
- B. R3
- C. R1
- D. R4
Correct Answer: A,B,C 🗳️
Explanation: Only visible for TestPassKing members. You can sign-up / login (it's free).
On the IS-IS IPv6 network shown in the figure, after the network becomes stable:
* R1 can ping 2000:12::0, and
* The display ipv6 neighbors command can be used to display the MAC address corresponding to 2000:
12::0.
Is this statement TRUE or FALSE?
- A. FALSE
- B. TRUE
Correct Answer: A 🗳️
Explanation: Only visible for TestPassKing members. You can sign-up / login (it's free).
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]
Both VLAN aggregation and MUX VLAN are deployed on the enterprise network shown in the figure, and all switch interfaces connected to terminals are access interfaces. Given this, match PCI to PC4 with the hosts or servers that they can access on the network. (Note: A host cannot be matched with itself. For example, PCI cannot match PCI.) (Tokens can be reused.)
Correct Answer:
VLAN aggregation is configured on a switched network. Sub-VLAN 2 and Sub-VLAN 3 are added to Super- VLAN 10.
To enable hosts in different Sub-VLANs to communicate with each other, run the _____ inter-sub-vlan-proxy enable command in the view of VLANIF 10, corresponding to the Super-VLAN.
(Enter the answer in lowercase letters only.)
Correct Answer:
supervlan
Explanation:
1. Understanding VLAN Aggregation in Huawei Switches
* VLAN aggregation is a technique that groups multiple VLANs (sub-VLANs) under a single Super- VLAN.
* Super-VLANs do not have member interfaces but include multiple Sub-VLANs that share a common gateway (VLANIF interface).
2. Inter-Sub-VLAN Communication Requirement
* By default, hosts in different sub-VLANs cannot communicate directly.
* To enable communication between different sub-VLANs within the same Super-VLAN, an inter-sub- VLAN proxy must be enabled.
* This is done using the inter-sub-vlan-proxy enable command in the VLANIF interface of the Super- VLAN.
3. Correct Command Usage
* The command format is:
shell
CopyEdit
supervlan inter-sub-vlan-proxy enable
* This command must be executed under VLANIF 10, corresponding to the Super-VLAN.
4. Why is the Answer " supervlan " ?
* The missing parameter in the command should be supervlan, because it is used to enable communication between Sub-VLANs under a Super-VLAN.
* This is a specific Huawei command used in HCIP-Datacom-Advanced Routing & Switching Technology certification.
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