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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Campus Network Planning and Deployment | 23% | - Campus Network Architecture Design
|
| Topic 2: WAN Interconnection Network Planning and Deployment | 8% | - WAN Interconnection Technologies
|
| Topic 3: Bearer WAN Planning and Deployment | 15% | - Bearer Network Architecture
|
| Topic 4: Advanced Routing and Switching Technologies | 37% | - Advanced Switching Technologies
|
| Topic 5: Network Automation Technologies and Practice | 17% | - Automation Foundation
|
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NEW QUESTION # 90
As shown in the figure, PE1 establishes an EVPN peer relationship with each of PE2 and PE3. When the network is initialized, CE1 sends an ARP request packet.
Which of the following statements are correct about how a PE processes the packet?
Answer: A,C,D
Explanation:
Understanding EVPN (Ethernet VPN) and ARP Request Handling
# What is EVPN?
* EVPN (Ethernet VPN) is a BGP-based control plane for VXLAN that improves Layer 2 & Layer 3 network scalability.
* Eliminates flood-and-learn behavior using BGP MAC/IP advertisement routes.
# Why is an ARP Request Sent?
* When CE1 (192.168.1.1/24) wants to communicate with CE2 (192.168.1.2/24), it sends an ARP request to discover the MAC address of CE2.
# How Does EVPN Process the ARP Request?1## PE1 receives the ARP request from CE1.2## PE1 sends a MAC/IP advertisement route (Type 2 EVPN route) to inform PE2 and PE3 of CE1's MAC address.3## PE1 forwards the ARP request as BUM (Broadcast, Unknown unicast, and Multicast) traffic to PE2 and PE3.4## PE3 (Designated Forwarder - DF) forwards the packet to CE2.5## PE2 (Non-DF) does NOT forward the packet to avoid loops.
Analysis of the Answer Choices:
# A. When forwarding the packet to PE3, PE1 needs to add the BUM traffic label allocated by PE3 to the packet.
* Correct:
* BUM (Broadcast, Unknown Unicast, Multicast) traffic in EVPN is encapsulated with a special label assigned by the receiving PE.
* PE1 adds the BUM traffic label for PE3 before sending the ARP request.
# B. PE1 sends a MAC/IP advertisement route carrying the MAC address of CE1.
* Correct:
* EVPN Type 2 MAC/IP advertisement routes are sent to inform other PEs of CE1's MAC/IP binding.
# C. PE2 forwards the packet to CE1.
* Incorrect:
* PE2 is the Non-Designated Forwarder (Non-DF) and does NOT forward BUM traffic to avoid loops.
# D. PE3 forwards the packet to CE1.
* Correct:
* PE3 is the Designated Forwarder (DF) for this segment, meaning it forwards the ARP request to CE2.
# Reference: Huawei HCIE-Datacom Guide - EVPN BGP MAC/IP Advertisement and BUM Traffic Handling Real-World Application:
* Data Center Interconnect (DCI): EVPN prevents excessive ARP flooding across VXLAN networks.
* Enterprise Campus Networks: Uses EVPN VXLAN to scale Layer 2 connectivity across multiple locations.
NEW QUESTION # 91
In the description of the MAC address spoofing attack, the error is ? Radio
Answer: B
NEW QUESTION # 92
In SRv6, each time a packet passes through an SRv6 endpoint node, the Segments Left field value decrements by 1, and the IPv6 DA changes.
Answer: B
Explanation:
Comprehensive and Detailed Explanation:
# SRv6 (Segment Routing over IPv6) works by encoding a segment list in the IPv6 header.
# How SRv6 Works:
* The Segments Left field indicates the remaining segments in the path.
* Each endpoint node processes the next segment and decrements Segments Left by 1.
* The IPv6 Destination Address (DA) is updated to the next segment.
Thus, the statement is TRUE.
# Reference: Huawei HCIE Datacom - SRv6 Packet Forwarding
NEW QUESTION # 93
Regarding the BGP alliance, the following description is wrong? Radio
Answer: B
NEW QUESTION # 94
The RR (Route Reflector) is critical to the Huawei SD-WAN Solution, and its deployment mode varies based on the scenario. In which of the following modes can an RR be deployed?
Answer: A,B,C
Explanation:
Understanding Route Reflectors (RRs) in Huawei SD-WAN
In Huawei's SD-WAN Solution, BGP Route Reflectors (RRs) are used to reduce the number of BGP peer relationships and optimize routing scalability.
🔹 Key Functions of an RR in SD-WAN:
Centralizes BGP route distribution in large-scale SD-WAN networks.
Reduces full-mesh BGP peering complexity.
Improves network scalability and convergence time.
Analysis of Each Deployment Mode:
✅ B. Independent deployment of the RR
Correct: The RR is deployed as a standalone device, independent of the SD-WAN hub site.
Best for large-scale SD-WAN deployments requiring dedicated route control.
✅ C. Co-deployment of the RR and hub site
Correct: The RR is co-located with the SD-WAN hub site, reducing infrastructure overhead.
Best for mid-sized SD-WAN deployments where the hub and RR functions can be combined.
✅ D. Partially independent deployment of the RR
Correct: The RR is partially separated from the hub but still shares some resources.
Provides a balance between full independence and co-location.
❌ A. Multi-area deployment of the RR (Incorrect Choice)
Multi-area RR deployment is not a common Huawei SD-WAN practice.
Huawei does not require separate RRs per area, as SD-WAN is based on centralized policy-based routing.
Real-World Application:
Large Enterprise SD-WAN: Uses independent RRs to optimize global network routing.
Service Provider SD-WAN: Uses co-deployed RRs to reduce infrastructure costs while maintaining route scalability.
✅ Reference: Huawei HCIE-Datacom Guide - BGP Route Reflectors in SD-WAN Architecture
NEW QUESTION # 95
......
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