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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Network Cutover | 7% | - Post-cutover validation - Cutover planning and risk assessment - Implementation and rollback strategy - Pre-cutover verification |
| Topic 2: MPLS Technologies | 19% | - LDP and RSVP-TE protocols - MPLS VPN (L3VPN, L2VPN) - MPLS fundamentals and label distribution - MPLS OAM and protection |
| Topic 3: Network O&M | 7% | - Configuration management and backup - Log and alarm management - Network monitoring and performance analysis - Routine maintenance procedures |
| Topic 4: IPv6 Routing | 20% | - IPv6 address planning and configuration - Transition mechanisms (dual-stack, tunnel, translation) - OSPFv3 and IS-IS for IPv6 - BGP4+ for IPv6 |
| Topic 5: Network Troubleshooting | 10% | - Routing protocol fault diagnosis - Performance and service fault resolution - Structured troubleshooting methodology - Switching and link fault handling |
| Topic 6: Advanced Ethernet Technologies | 10% | - Ethernet link aggregation and reliability - Port isolation and security features - QinQ and VLAN mapping - VLAN aggregation and MUX VLAN |
| Topic 7: Advanced IGP Features | 17% | - IS-IS advanced features
|
| Topic 8: Advanced BGP Features | 10% | - BGP route selection and attributes - Routing policies and filtering - Route reflectors and confederations - BGP multi-homing and load balancing |
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187. Frage
In an intra-domain MPLS VPN network, when a data packet enters the public network and is forwarded, it will be encapsulated with two layers of MPLS labels. Which of the following description is wrong about the two layers of labels? (Multiple choice)
Antwort: A,B
188. Frage
Large and midsize enterprise networks can be divided into the access layer, aggregation layer, and core layer.
Network engineers need to work out a migration solution for the operations to be performed at any layer, as long as the operations affect services on the live network.
Options:
Antwort: A
Begründung:
Comprehensive and Detailed In-Depth Explanation:
* Enterprise networks follow a hierarchical model:# Access Layer: Connects end-user devices and enforces security policies.# Aggregation Layer: Provides traffic aggregation and policy control.# Core Layer: Provides high-speed backbone connectivity.
* Any migration that impacts live services must be carefully planned at any layer.
* Network engineers must develop a migration solution to avoid service disruptions, regardless of whether the changes are at the access, aggregation, or core layer.
# Reference: HCIP-Datacom Advanced Routing & Switching Technology - Network Migration Strategy
189. Frage
In the network shown in the figure, the OSPF protocol is deployed between R2 and R1, and the IS-IS protocol is deployed between R2 and R3. In order for R1 to obtain the route to 10.0.3.3/32, the IS-IS route is introduced into the OSPF route on R2. The FA address in the Type5 LSA generated by R2 is ().
Antwort:
Begründung:
0.0.0.0
190. Frage
In a BGP/MPLS IP VPN network, VPNv4 routing transfer will carry RD values. Which of the following path attributes does MP-BGP use to carry the RD value?
Antwort: C
191. Frage
On the network shown in the figure, an administrator first completes the routing configuration and then enables MPLS and LDP on R1, R2, and R3 and their interconnected interfaces. In this manner, traffic from PC1 to PC2 can be forwarded based on MPLS. Which of the following routing configurations can implement this function?
Options:
Antwort: C
Begründung:
Comprehensive and Detailed In-Depth Explanation:
This question is based on MPLS (Multiprotocol Label Switching) and its interaction with routing protocols.
The goal is to ensure PC1 (10.1.1.1) can communicate with PC2 (10.3.3.1) over MPLS. Let ' s analyze each option carefully.
1## Understanding MPLS Routing Requirements
To forward traffic using MPLS and LDP, we need:
* An IGP (Interior Gateway Protocol) like OSPF or IS-IS to advertise network reachability.
* Loopback interfaces advertised in OSPF to establish LDP neighbor relationships.
* Consistent MPLS LDP enablement on all links in the MPLS domain.
* End-to-end IP reachability between loopbacks (since LDP uses the loopback for label distribution).
2## Option A (Correct Answer) Analysis
This configuration enables OSPF on all routers (R1, R2, and R3) across the MPLS domain:
# All networks are advertised in OSPF area 0, ensuring IP reachability.
# Loopback interfaces (1.1.1.1, 2.2.2.2, 3.3.3.3) are included, which is required for MPLS LDP peer establishment.
# PC1 ' s network (10.1.1.0/24) and PC2 ' s network (10.3.3.0/24) are properly advertised, ensuring end-to-end connectivity.
# R1, R2, and R3 have OSPF neighbor relationships, meaning LDP can use OSPF routes for label switching.
# Conclusion: Option A meets all MPLS forwarding requirements and is the correct answer.
3## Why Other Options Are Incorrect
# Option B (Incorrect)
* Uses BGP instead of OSPF, which is not optimal for MPLS forwarding in a simple MPLS domain.
* LDP requires an IGP like OSPF or IS-IS to work efficiently.
* BGP alone does not establish LDP label bindings between R1, R2, and R3.
# Option C (Incorrect)
* Mixes OSPF and BGP, causing routing inconsistency.
* Uses ip ip-prefix and recursive lookup, which is unnecessary in a standard MPLS domain.
* BGP does not distribute labels dynamically like an IGP with LDP.
# Option D (Incorrect)
* R1 does not advertise the 10.1.1.0/24 network, meaning PC1's network is not reachable.
* R3 does not advertise the 10.3.3.0/24 network, meaning PC2's network is not reachable.
* Missing essential routing entries for full end-to-end reachability.
References:
# HCIP-Datacom Advanced Routing & Switching Technology# Huawei Official MPLS and LDP Configuration Guide# Huawei Enterprise Networking Documentation
192. Frage
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