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| Section | Weight | Objectives |
|---|---|---|
| WAN Interconnection Network Planning and Deployment | 8% | - Inter-AS VPN
|
| Advanced Routing and Switching Technology | 37% | - IS-IS
|
| Bearer WAN Planning and Deployment | 15% | - VPN Services
|
| Network Automation | 17% | - Automation Technologies
|
| Campus Network Planning and Deployment | 23% | - Underlay Network
|
>> H12-891_V1.0 Valid Test Objectives <<
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NEW QUESTION # 228
A network administrator runs thedisplay telemetry subscriptioncommand on a device to check telemetry subscription information. The command output is as follows:
[~CE] display telemetry subscription
Sub-name : Sub1
Sensor group:
Sensor-name Sample-interval(ms) State
Sensor1 1000 RESOLVED
Destination group:
Dest-name Dest-IP Dest-port State Vpn-name Protocol
Dest1 192.168.56.1 20000 RESOLVED - GRPC
Sub-state : PASSIVE
Total subscription number is : 1
Which of the following statements is incorrect?
Answer: B
Explanation:
Comprehensive and Detailed In-Depth Explanation:
Analyzing the output:
A). The device sends sampled data every second:Correct. Thesample interval is 1000 ms (1 second).
B). The subscription name is Sub1:Correct. Thesubscription nameis clearly shown asSub1.
C). The subscription mode is static subscription:Correct. Since theSub-stateisPASSIVE, it indicates astatic subscription.
D). The IP address of the device is 192.168.56.1:Incorrect. The IP address192.168.56.1shown in the output is thedestination IPwhere the telemetry data is sent, not the IP address of the device itself.
Reference:
Huawei HCIE Datacom Official Certification Guide
Huawei Telemetry Configuration Guide
NEW QUESTION # 229
IGMP SSMMapping is bound to multicast through a static multicast source, so that members of IGMPv1 and IGMP2 can also access the SSM multicast network. The following statement about IGMPSSMMapping is wrong?( Radio).
Answer: D
NEW QUESTION # 230
When you deploy LLQ, you need to configure bandwidth parameters, what is the significance of bandwidth parameters?( Single choice questions).
Answer: A
NEW QUESTION # 231
In SSP packages, Jinja2 templates are used to implement mapping. In the Jinja2 syntax, {% ... %} contains control structures, for example, a 'for' loop.
Answer: A
Explanation:
Understanding Jinja2 Templates in Huawei SSP Packages
# What is Jinja2?
* Jinja2 is a templating engine used in Huawei SSP (Smart Script Package) automation.
* It allows dynamic configuration generation based on variables and logic.
# Jinja2 Syntax Basics:# {% ... %} # Used for control structures like loops and conditions.# {{ ... }} # Used for variable placeholders.
Example of a Jinja2 Template Using {% ... %} for a Loop:
jinja2
CopyEdit
{% for interface in interfaces %}
interface {{ interface.name }}
description {{ interface.description }}
{% endfor %}
# This template dynamically generates interface configurations based on a list of interfaces.
Why is the Answer TRUE?
# {% ... %} is used for control structures in Jinja2 templates (e.g., loops, if-else statements).# Jinja2 templates are widely used in SSP for Huawei network automation.
Real-World Application:
* Automated Network Configuration: Uses Jinja2 in Huawei SSP automation scripts.
* Data Center & SDN Automation: Dynamically generates VXLAN, BGP, and OSPF configurations.
# Reference: Huawei HCIE-Datacom Guide - Jinja2 Templates in SSP Packages
NEW QUESTION # 232
As shown in the figure, ARP broadcast suppression is enabled on VTEP1 in BD 20 (VNI 200).
* VTEP1 learns ARP information about PC2 through BGP EVPN routes.
* When VTEP1 forwards the ARP request for PC1's MAC address to VTEP2,
* What is the destination MAC address of the inner data frame?
Answer: C
Explanation:
Understanding VXLAN and ARP Suppression in BGP EVPN
VXLAN (Virtual Extensible LAN) is used to extend Layer 2 networks over Layer 3 infrastructure.
* VXLAN uses VTEPs (VXLAN Tunnel Endpoints) to encapsulate and forward Layer 2 traffic.
* BGP EVPN (Ethernet VPN) is used for MAC/IP address learning and distribution across VXLAN networks.
How ARP Request Forwarding Works in This Scenario?
1## ARP Broadcast Suppression Enabled (VXLAN Optimized Forwarding)
* Since ARP broadcast suppression is enabled on VTEP1, the ARP request is not flooded.
* Instead, VTEP1 checks its EVPN learned database to find PC2's MAC address (MAC C).
2## VTEP1 Encapsulates the ARP Request
* VTEP1 encapsulates the ARP request in a VXLAN packet and sends it to VTEP2.
* The original ARP frame inside the VXLAN tunnel still has:
* Source MAC: MAC A (PC1's MAC)
* Destination MAC: MAC C (PC2's MAC, learned via EVPN)
3## VXLAN Outer Headers
* The outer VXLAN header uses:
* Source IP: 1.1.1.1 (VTEP1)
* Destination IP: 2.2.2.2 (VTEP2)
* VNI (VXLAN Network Identifier): 200 (BD 20)
4## VTEP2 Receives and Forwards the ARP Request
* VTEP2 decapsulates the VXLAN packet and forwards the original ARP request to PC2 (MAC C).
* This ensures that only the intended receiver (PC2) gets the ARP request, preventing unnecessary broadcast flooding.
Why the Answer is MAC C?
# B. MAC C is Correct
* The destination MAC of the inner data frame is PC2's MAC (MAC C).
* This is because VTEP1 forwards the ARP request directly to VTEP2, which then forwards it to PC2.
Why Other Answers Are Incorrect?
# A. MAC B (Incorrect)
* MAC B is VTEP1's MAC address, which is used in the outer VXLAN header, not in the inner Ethernet frame.
# C. MAC A (Incorrect)
* MAC A is the source MAC of the ARP request (PC1), not the destination.
# D. MAC D (Incorrect)
* MAC D is not mentioned in the topology, so it is irrelevant.
# Reference: Huawei HCIE Datacom - VXLAN BGP EVPN and ARP Suppression
NEW QUESTION # 233
......
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