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| Section | Weight | Objectives |
|---|---|---|
| Network Automation | 17% | - iMaster NCE
|
| WAN Interconnection Network Planning and Deployment | 8% | - MPLS VPN
|
| Advanced Routing and Switching Technology | 37% | - IS-IS
|
| Campus Network Planning and Deployment | 23% | - Underlay Network
|
| Bearer WAN Planning and Deployment | 15% | - Traffic Engineering
|
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NEW QUESTION # 240
If multiple candidate RPs are configured in a multicast group, which of the following parameters does the RP that elect the group from multiple candidate RPs need to be compared?
Answer: A,C,D
NEW QUESTION # 241
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.
๐น 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:
โ
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.
โ
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.
โ
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.
โ 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.
โ
Reference: Huawei HCIE-Datacom Guide - BGP Route Reflectors in SD-WAN Architecture
NEW QUESTION # 242
In the following figure, OSPF is enabled on all router interfaces. The IP addresses marked in the figure belong to Loopback0 of the routers.
The Loopback0 addresses of R1 and R2 are advertised in Area 1, the Loopback0 address of R4 is advertised in Area 0, and the Loopback0 addresses of R3 and R5 are advertised in Area 2. Given this, which of the following IP addresses can ping each other?
Answer: D
Explanation:
Understanding OSPF Multi-Area Routing
# OSPF (Open Shortest Path First) is a link-state routing protocol that uses a hierarchical area design for scalability.# OSPF Areas in the Diagram:
* Area 0 (Backbone Area): Contains R4 (Loopback 10.0.4.4/32).
* Area 1: Contains R1 (Loopback 10.0.1.1/32) and R2 (Loopback 10.0.2.2/32).
* Area 2: Contains R3 (Loopback 10.0.3.3/32) and R5 (Loopback 10.0.5.5/32).
* R1 and R2 connect Area 1 to Area 0.
* R1 and R3 connect Area 1 to Area 2.
How OSPF Advertises Routes Across Areas
# Intra-area communication (within the same area) is always possible.# Inter-area communication is possible if the ABR (Area Border Router) correctly advertises routes.# OSPF does NOT automatically advertise routes from one non-backbone area (e.g., Area 2) to another (e.g., Area 0) unless explicitly allowed.
Analysis of the Answer Choices:
# A. 10.0.3.3 and 10.0.5.5 (Incorrect)
* Both R3 (10.0.3.3) and R5 (10.0.5.5) are in Area 2.
* R3 and R5 can communicate directly, but OSPF rules require an Area Border Router (ABR) to share routing information between areas.
* Since no information is provided about inter-area route redistribution, we cannot confirm that R3 and R5 can reach each other.
# B. 10.0.2.2 and 10.0.5.5 (Incorrect)
* R2 (10.0.2.2) is in Area 1, and R5 (10.0.5.5) is in Area 2.
* R2 does NOT have direct OSPF reachability into Area 2.
# C. 10.0.2.2 and 10.0.3.3 (Correct)
* R2 (10.0.2.2) is in Area 1, and R3 (10.0.3.3) is in Area 2.
* R1 connects both Area 1 and Area 2, meaning R2 and R3 can communicate via R1.
* R1 is the ABR (Area Border Router) between Area 1 and Area 2, so it will advertise routes from R3 to R2 and vice versa.
# D. 10.0.4.4 and 10.0.2.2 (Incorrect)
* R4 (10.0.4.4) is in Area 0 (Backbone), and R2 (10.0.2.2) is in Area 1.
* R2 does NOT connect directly to Area 0, so R2 does not learn routes from Area 0 unless R1 explicitly redistributes them.
* No explicit information about route redistribution is provided.
# Reference: Huawei HCIE-Datacom Guide - OSPF Multi-Area Routing & ABR Role Real-World Application:
* Enterprise WAN Networks: Multi-area OSPF is used to scale large enterprise networks while maintaining fast convergence.
* Service Provider Networks: ABRs control route distribution, preventing unnecessary flooding of routing updates across areas.
NEW QUESTION # 243
Fill in Blank
During the configuration of L3VPNv4 over SRv6 BE, if an RR is deployed in the SR domain, which command must be run on the RR to ensure that the PEs at both ends can correctly learn VPNv4 routes?
Answer:
Explanation:
peerretainroutetargetall
Explanation:
Understanding L3VPNv4 Over SRv6 BE
๐น What is L3VPNv4?
L3VPNv4 (Layer 3 VPN over IPv4) allows MPLS-based VPN services over an SRv6 backbone.
Uses MP-BGP (Multiprotocol BGP) to distribute VPN routes.
๐น Why is an RR (Route Reflector) Needed?
An RR simplifies BGP route exchange between multiple PEs (Provider Edge routers).
Without proper configuration, RRs may filter VPNv4 routes, preventing PEs from learning routes correctly.
Why is the Command peer retain-route-target all Needed?
โ
Ensures that the RR retains all VPNv4 routes.
โ
Prevents the RR from filtering route targets (RTs), allowing full VPN reachability.
โ
Without this command, the RR might not reflect all VPNv4 routes, causing connectivity issues.
Real-World Application:
Enterprise MPLS VPNs: Ensures correct BGP route reflection in an SRv6-based L3VPN.
Carrier Networks: Helps service providers maintain full BGP VPN route distribution.
โ
Reference: Huawei HCIE-Datacom Guide - BGP Route Reflectors in L3VPN over SRv6
NEW QUESTION # 244
RTA is the source DR router, RTB is the RP router, and the multicast source sends multicast data to the RTA, but the PIM is not visible on the RTB Register the multicast source to which the message is registered, then the possible causes are ?
Answer: A,B,C,D
NEW QUESTION # 245
......
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