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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Network Troubleshooting | 10% | - Fault diagnosis and analysis methods - Troubleshooting routing and switching issues |
| Topic 2: Advanced Ethernet Technologies | 10% | - VLAN stacking and QinQ - Ethernet OAM and protection mechanisms - Advanced link aggregation and reliability |
| Topic 3: Network Cutover and Migration | 7% | - Migration strategies and risk control - Service switchover and verification |
| Topic 4: Network O&M | 7% | - Network monitoring and management tools - Performance optimization and capacity planning |
| Topic 5: Advanced BGP Features | 10% | - BGP path control and filtering - Route reflectors and confederations - BGP route attributes and policies |
| Topic 6: MPLS Technologies | 19% | - MPLS protection and fast reroute - MPLS basics and label distribution - MPLS VPN and traffic engineering |
| Topic 7: IPv6 Routing | 20% | - BGP4+ and IPv6 route deployment - IPv6 addressing and transition technologies - OSPFv3 and IS-IS for IPv6 |
| Topic 8: Advanced IGP Features | 17% | - IS-IS advanced features and convergence - OSPF advanced features and optimization - IGP route selection and control |
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NEW QUESTION # 108
In the figure, an administrator needs to enable MPLS LDP on R1 to R4. Which of the following configurations of R1 is correct?
Answer: B
Explanation:
Comprehensive and Detailed In-Depth Explanation:
To determine the correct configuration, we need to analyze how MPLS LDP (Label Distribution Protocol) is correctly enabled on a Huawei router.
1. Required Steps to Enable MPLS LDP on R1
To enable MPLS LDP on R1 and establish LDP sessions, the following steps must be followed:
# Step 1: Configure the MPLS LSR ID (Loopback IP recommended)
* MPLS LSR ID is a unique identifier for the Label Switch Router (LSR).
* Command:
shell
CopyEdit
mpls lsr-id 1.1.1.1
* Why?
* The LSR ID must be configured for LDP to function properly in an MPLS network.
* It is usually set to a loopback address for stability and consistency.
# Step 2: Enable MPLS Globally
* Command:
shell
CopyEdit
mpls
* Why?
* This enables MPLS forwarding on the device.
# Step 3: Enable MPLS LDP Globally
* Command:
shell
CopyEdit
mpls ldp
* Why?
* LDP is needed for label distribution in the MPLS domain.
* Without this, routers cannot exchange MPLS labels.
# Step 4: Enable MPLS and LDP on the Required Interface
* Command:
shell
CopyEdit
interface gigabitethernet 0/0/1
mpls
mpls ldp
* Why?
* MPLS must be enabled on interfaces that participate in MPLS forwarding.
* LDP must also be enabled on these interfaces to distribute labels over MPLS links.
2. Analyzing the Answer Choices
# Option B (Correct)
shell
CopyEdit
[R1] mpls lsr-id 1.1.1.1 # (Sets LSR ID)
[R1] mpls # (Enables MPLS globally)
[R1-mpls] quit
[R1] mpls ldp # (Enables LDP globally)
[R1-mpls-ldp] quit
[R1] interface gigabitethernet 0/0/1
[R1-GigabitEthernet0/0/1] mpls # (Enables MPLS on interface)
[R1-GigabitEthernet0/0/1] mpls ldp # (Enables LDP on interface)
[R1-GigabitEthernet0/0/1] quit
* This configuration correctly enables MPLS LDP on R1.
* All required steps are followed, including the LSR ID, MPLS, LDP, and interface activation.
# Option A (Incorrect)
shell
CopyEdit
[R1] mpls lsr-id 1.1.1.1
[R1] mpls
[R1-mpls] quit
[R1] mpls ldp
[R1-mpls-ldp] quit
[R1] interface gigabitethernet 0/0/1
[R1-GigabitEthernet0/0/1] mpls #
[R1-GigabitEthernet0/0/1] quit # (Missing "mpls ldp" under interface)
* Missing mpls ldp under interface configuration.
* Without this, the interface will not establish an LDP session # Incorrect.
# Option C (Incorrect)
shell
CopyEdit
[R1] mpls
[R1-mpls] quit
[R1] mpls ldp
[R1-mpls-ldp] quit
[R1] interface gigabitethernet 0/0/1
[R1-GigabitEthernet0/0/1] mpls
[R1-GigabitEthernet0/0/1] mpls ldp
[R1-GigabitEthernet0/0/1] quit
* Missing mpls lsr-id 1.1.1.1.
* LSR ID is critical for LDP sessions # Incorrect.
# Option D (Incorrect)
shell
CopyEdit
[R1] mpls lsr-id 1.1.1.1
[R1] mpls
[R1-mpls] quit
[R1] interface gigabitethernet 0/0/1
[R1-GigabitEthernet0/0/1] mpls
[R1-GigabitEthernet0/0/1] mpls ldp
[R1-GigabitEthernet0/0/1] quit
* Missing global MPLS LDP configuration (mpls ldp).
* Without enabling LDP globally, labels will not be distributed.
* This makes LDP sessions fail. # Incorrect.
NEW QUESTION # 109
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 following command in the VLANIF 10 view corresponding to the Super-VLAN. (Enter lowercase letters.)
Answer:
Explanation:
inter-sub-vlan-proxy enable
NEW QUESTION # 110
If a network engineer forgets the console port password when troubleshooting, Huawei Net Engine AR series routers support configuration in the Boot ROM to skip the console port password startup.
Answer: A
NEW QUESTION # 111
Network administrator A wants to use AS-Path Filter to match the BGP routing attribute AS_PATH[100200300]. Network administrator A sorts out the four configurations in the figure. Which of the following configurations can meet the requirements of network administrator A?
Answer: A,D
NEW QUESTION # 112
As shown in the figure, in order to realize the correct transmission of VPN routes in the Hub&Spoke network, the administrator deployed IGP between Hub-PE and Hub-CE, and deployed EBGP between Spoke-PE and Spoke-CE.
Answer: A
NEW QUESTION # 113
......
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