Exam Name: HCIP-Datacom-Advanced Routing & Switching Technology V1.0
Certification Provider: Huawei
Corresponding Certification: HCIP-Datacom
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Huawei H12-831_V1.0-ENU Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Network O&M | 7% | - Monitoring and health metrics - Operation & maintenance best practices |
| Topic 2: Troubleshooting | 10% | - Issue resolution strategies - Network diagnostics |
| Topic 3: Advanced IGP Features | 17% | - IS-IS advanced optimisations - OSPF advanced capabilities |
| Topic 4: IPv6 Routing | 20% | - OSPFv3/IS-IS for IPv6 - IPv6 static and dynamic routing |
| Topic 5: Advanced BGP Features | 10% | - Route reflector and attributes - BGP policy controls |
| Topic 6: Advanced Ethernet Technologies | 10% | - VLAN and Ethernet enhancements - MAC/security features |
| Topic 7: MPLS Technologies | 19% | - MPLS LDP and TE - MPLS VPN basics |
| Topic 8: Network Cutover | 7% | - Migration planning techniques - Rollback procedures |
Huawei HCIP-Datacom-Advanced Routing & Switching Technology V1.0 Sample Questions:
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.
BFD for OSPF refers to the association of BFD with OSPF to speed up OSPF ' s response to network topology changes. The OSPF neighbor relationship can enter the Full state only after the BFD session goes up. The OSPF neighbor relationship can go down only after the BFD session goes down.
- A. TRUE
- B. FALSE
Correct Answer: A 🗳️
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 .
A large-scale BGP network has a large number of peers. Configuring and maintaining these peers is difficult. You can add the BGP peers with the same configurations to a BGP peer group and then configure the BGP peers in batches to simplify peer management and improve route advertisement efficiency. When configuring an IBGP peer group, you do not need to specify an AS number for the peer group. When configuring an EBGP peer group, you must specify an AS number for the peer group.
- A. TRUE
- B. FALSE
Correct Answer: A 🗳️
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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. TRUE
- B. FALSE
Correct Answer: B 🗳️
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