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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Advanced Routing and Switching Technologies | 37% | - Advanced Switching Technologies
|
| Topic 2: Campus Network Planning and Deployment | 23% | - Campus Network Service Deployment
|
| Topic 3: WAN Interconnection Network Planning and Deployment | 8% | - WAN Service Optimization
|
| Topic 4: Bearer WAN Planning and Deployment | 15% | - Bearer Network Architecture
|
| Topic 5: Network Automation Technologies and Practice | 17% | - Huawei Automation Solutions
|
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NEW QUESTION # 176
As shown in the following topology, EBGP is running between AS100, AS200, AS300, AS400, and the neighbor relationship is established S400 When you receive a BGP route from ASI00 for a 1.1.1.1/32 network segment, is the path order recorded in the ASPath properties correct?
Answer: A
NEW QUESTION # 177
Refer to the output information of a device below. According to the information, which of the following MPLS labels is carried in a data packet forwarded by the device to 10.0.1.1?
Answer: C
Explanation:
Comprehensive and Detailed
✔ MPLS labels in SR-MPLS are calculated using the SRGB (Segment Routing Global Block) base and the Prefix-SID.
✔ Label Calculation Formula:
MPLS Label=SRGB Base+Prefix-SID\text{MPLS Label} = \text{SRGB Base} + \text{Prefix-SID}MPLS Label=SRGB Base+Prefix-SID
✔ Extracting Values from the LSDB:
SRGB Base: 36000
Prefix-SID: 300
✔ Valid MPLS Labels:
36000 + 300 = 36300
40002 and 38002 fall within the SRGB range.
39002 is outside the expected range, making it the incorrect answer.
📖 Reference: Huawei HCIE Datacom - Segment Routing Label Calculation
NEW QUESTION # 178
SR-MPLS is enabled on all routers. The label information encapsulated by R1 into a data packet is shown in the figure.
Which of the following is the forwarding path of the data packet?
Answer: B
Explanation:
Comprehensive and Detailed In-Depth
1. Understanding SR-MPLS (Segment Routing with MPLS):
Segment Routing (SR) leverages MPLS labels to define paths through the network.
The labels represent segments (nodes or specific paths) rather than traditional LDP or RSVP-TE labels.
The label stack determines the forwarding path through the network.
Top Label: Determines the next hop.
Next Label: After label pop, it indicates the subsequent hop.
2. Analyzing the Given Label Stack:
The label stack encapsulated by R1 is as follows:
Layer2: 2046
2013
2032
2024
2046
Layer3
The top label (2046) indicates that the next-hop router is R4.
After R4 pops the top label, the next label (2046) directs the packet to R6.
3. Forwarding Path Analysis:
Step 1: R1 sends the packet to R2 based on internal routing.
Step 2: R2 forwards the packet directly to R4 as dictated by the top label (2046).
Step 3: R4 pops the top label (2046) and checks the next label (again 2046), directing the packet to R6.
Step 4: R6 receives the packet as the final destination.
4. Why Option B is Correct:
The path R1-R2-R4-R6 matches the label stack processing in SR-MPLS.
The labels indicate the shortest path chosen by SR policies, which is R1 → R2 → R4 → R6.
The SR-MPLS label stack efficiently guides the packet through the optimal path without complex signaling.
Why Other Options Are Incorrect:
Option A (R1-R2-R3-R5-R6):
This path does not match the label sequence as the labels clearly indicate a direct path via R4, not through R3 and R5.
Option C (R1-R3-R2-R4-R6):
This path is longer and unnecessary, as the label stack indicates a more direct path via R2 and R4.
Reference:
Huawei HCIE-Datacom V1.0 Training Materials
Huawei Official Documentation: SR-MPLS Configuration Guide
RFC 8660 - Segment Routing with MPLS Data Plane
HCIE-Datacom Knowledge Base: Segment Routing and MPLS
NEW QUESTION # 179
When designing IGP routes for an enterprise bearer WAN, ensure that the metric of aggregation-layer links is smaller than that of access-layer links, so that data can be preferentially forwarded over aggregation-layer links.
Answer: A
Explanation:
IGP Metric Design in Enterprise WANs
In an enterprise bearer WAN, routing metrics determine path selection. The aggregation layer connects multiple access-layer devices to the core network, so it should have a lower metric to:
✅ Ensure traffic is forwarded through higher-capacity aggregation links instead of lower-bandwidth access links.
✅ Optimize traffic flow, reduce congestion, and improve network efficiency.
✅ Enhance reliability by preferring more stable aggregation links.
IGP Routing Protocols Considerations:
OSPF: Lower cost values indicate preferred paths.
IS-IS: Lower link metrics result in preferred forwarding paths.
Reference from Huawei HCIE-Datacom Documentation:
Huawei IGP Design Guide - Enterprise WAN Routing Optimization
HCIE-Datacom Training Material - Metric Calculation and Path Selection in OSPF/IS-IS
NEW QUESTION # 180
If SRv6 needs to be deployed on a bearer WAN, which of the following technologies are required? (Select all that apply)
Answer: A,D
Explanation:
For SRv6 (Segment Routing over IPv6) deployment on a bearer WAN, the following are essential:
IGP (OSPFv3 or IS-IS): Required for SID advertisement and SRv6 route computation → ✅ BGP: Required when deploying inter-domain SRv6 or for control plane distribution of VPN/service routes → ✅ Not required:
MPLS: SRv6 replaces MPLS labels with IPv6-based SIDs → ❌
BGP-LU: Used in MPLS-based inter-AS scenarios, not applicable to SRv6 → ❌ Correct answers: B, C
NEW QUESTION # 181
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