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  1. Home
  2. Huawei Certification
  3. H12-891_V1.0 Exam
  4. Huawei.H12-891_V1.0.v2025-06-03.q273 Dumps
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Question 246

What are the common ways to learn routing in BGP? ( Multi-select)

Correct Answer: A,B,D
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Question 247

In the use of the CP protocol, the following description is correct?

Correct Answer: B
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Question 248

Which of the following types of EVPN routes does not carry MPLS labels?

Correct Answer: C
Comprehensive and Detailed Explanation:
Ethernet VPN (EVPN) is an advanced L2VPN technology that enhances MAC learning and forwarding in data center and enterprise networks. Different EVPN route types are used for various functions:
* Ethernet A-D (Auto-Discovery) Route: Used for auto-discovery of PE devices and does carry labels
.
* MAC/IP Advertisement Route: Distributes MAC-to-IP mappings and carries labels for forwarding decisions.
* Ethernet Segment Route: Does not carry MPLS labels as it is used to signal multi-homing and redundancy information.
* Inclusive Multicast Route: Used for multicast forwarding and carries labels for tunnel identification.
Since Ethernet Segment Route is used only for multi-homing signaling and does not carry MPLS labels, the correct answer is C.
# Reference: Huawei HCIE Datacom Study Guide - EVPN Route Types
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Question 249

Cross-device link aggregation realizes the back-to-back transmission of data traffic and the mutual spare of the heap member switches, but due to the limited bandwidth of the heap cable between the heap devices, the forwarding efficiency can be improved in the following ways?

Correct Answer: A
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Question 250

This figure shows anSRv6 (Segment Routing over IPv6)packet. If theDestination Addressfield in the IPv6 basic header isFC04::4, the value of theSL (Segment Left)field in the SRv6 header should be____.(Enter only digits.)

Correct Answer:
1
Explanation:
Comprehensive and Detailed In-Depth Explanation:1. Understanding SRv6 (Segment Routing over IPv6):
SRv6 uses theIPv6 headeralong with an additionalSRH (Segment Routing Header)to implement segment routing within an IPv6 network. The SRH contains:Segment List (SL):A listof IPv6 addresses (segments) to traverse.SL (Segments Left):An integer that indicates thenumber of segmentsyet to be visited.Active Segment:
Thenext IPv6 addressin the segment list, stored in theDestination Addressfield of the IPv6 header.2.
Analyzing the Given Scenario:Thesegment list (SL)in the SRH header shows:FC04::400FC04::4FC03::3The segment list is processed inreverse order(from bottom to top).SL (Segments Left)indicates theindex of the active segmentin the list.TheDestination Addressin the IPv6 header is currentlyFC04::4, indicating that theactive segmentis thesecond elementin the list.3. Determining the Value of SL:Theindexingin the segment list starts from0.SinceFC04::4is thesecond segment (from the bottom), the value ofSLwill be1.This means that1 segment is leftto be processed after the current one (FC04::4).Once the packet reachesFC04::4, theSL value will decrement to 0, and the next segment (FC03::3) will be processed.4. Why the Answer is 1:TheSL value decreases as segments are processed.As the currentactive segmentis thesecond in the list (from the bottom), theSL value is 1.
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