H12-891_V1.0 Exam Dumps and Practice Questions

Telemetry Data Collection in Huawei Devices

Telemetry allows real-time streaming of network performance data based on predefined sampling paths. Supported sampling paths include:

A. Interface statistics

Monitors real-time traffic usage, errors, and packet loss on interfaces.

C. CPU information

Tracks CPU utilization and performance metrics.

D. Memory information

Monitors RAM usage and system memory consumption.

Incorrect Answer:

B. Information about the optical module on an interface

Telemetry does not natively support direct optical module monitoring; instead, SNMP or CLI commands like display transceiver are used.

Reference from Huawei HCIE-Datacom Documentation:

Huawei Telemetry Configuration Guide -- Supported Sampling Paths

HCIE-Datacom Study Material -- Network Performance Monitoring with Telemetry

Understanding 6PE & 6VPE in MPLS Networks

6PE (IPv6 Provider Edge) and 6VPE (IPv6 VPN Provider Edge) are MPLS-based solutions that allow IPv6 traffic to be carried over an MPLS IPv4 core network without requiring the entire backbone to support IPv6.

6PE (IPv6 over MPLS - No VPN)

Used for global IPv6 routing without VPN segmentation.

No need for VRFs (VPN Routing and Forwarding instances) because IPv6 prefixes are handled natively.

6VPE (IPv6 VPN over MPLS - Supports VPNs)

Extends MPLS L3VPN to support IPv6 routing inside VPN instances.

Uses MP-BGP VPNv6 to distribute IPv6 prefixes inside MPLS VPNs.

Why is the Answer TRUE?

No VRFs are required for 6PE:

6PE only needs BGP labeled IPv6 routes in the global routing table.

IPv6 prefixes are carried using MPLS labels without VPN segmentation.

VRFs are required for 6VPE, NOT for 6PE:

6VPE requires VPN instances (VRFs) for IPv6 L3VPNs, but 6PE does not.

Real-World Application:

6PE is used in large ISP networks where IPv6 deployment is needed but without VPN separation.

6VPE is used for enterprise MPLS VPNs, allowing customers to have isolated IPv6 routing tables.

Reference: Huawei HCIE-Datacom Guide -- MPLS IPv6 Transition Technologies (6PE & 6VPE)

In Huawei's VXLAN implementation, the typical mapping between VNIs (VXLAN Network Identifiers) and BDs (Bridge Domains) is:

1:1 mapping --- each VNI is uniquely associated with a single bridge domain.

This allows proper MAC learning and forwarding in the data plane for isolated tenant traffic.

Other mappings (N:1, 1:N, N:M) may be technically possible but not recommended or supported in most enterprise deployments.

Correct answer: B. 1:1

Huawei SD-WAN supports various intelligent traffic steering mechanisms to optimize link utilization and balance network traffic across multiple links.

D. Traffic bandwidth-based traffic steering

This method ensures that traffic is distributed across multiple links based on available bandwidth.

SD-WAN dynamically selects links based on their real-time bandwidth utilization, ensuring optimal performance and load balancing.

Comprehensive and Detailed In-Depth

An NVE (Network Virtualization Edge) interface is responsible for connecting physical or virtual devices to a VXLAN network. It functions as the VTEP (VXLAN Tunnel Endpoint) and supports encapsulation and decapsulation of VXLAN packets.

Layer 2 VXLAN gateway (D) is used for intra-subnet communication, but the NVE interface is the actual point where traffic enters the VXLAN network.

Layer 3 VXLAN gateway (A) is used for inter-subnet communication.

VLANIF interface (C) is used for VLAN-based communication, not directly for VXLAN.

Therefore, the NVE interface (B) is the correct answer as it serves as the traffic ingress and egress point for the VXLAN network.

Huawei HCIE Datacom Official Certification Guide

Huawei VXLAN Configuration and Maintenance Guide