Huawei H12-893_V1.0 Exam With Confidence Using Practice Dumps

On Huawei CloudEngine (CE) series switches, VXLAN tunnel monitoring and troubleshooting involve specific commands to diagnose issues such as tunnel Down status or failed dynamic establishment. Let’s evaluate each option:

A. Run the display vxlan statistics command to check the cause of the fault:This command provides statistics on VXLAN tunnel traffic, including packet drops, encapsulation/decapsulation counts, and errors. It helps identify issues like misconfiguration or network congestion, making it a valid troubleshooting tool.TRUE.

B. Run the display vxlan peer command to check the cause of the fault on the peer device of the tunnel:This command displays information about VXLAN peers, including their IP addresses, VNIs, and reachability status. Checking the peer device’s status can reveal connectivity or configuration mismatches, aiding fault diagnosis.TRUE.

C. Run the display vxlan troubleshooting command to check the causes of at most the latest five failures to dynamically establish a VXLAN tunnel:This command logs and displays troubleshooting details, including the latest five failure reasons for dynamic tunnel setup (e.g., BGP EVPN issues or reachability problems). This is a standard feature on Huawei CE switches.TRUE.

D. Run the display vxlan troubleshooting command to check at most the latest five reasons why a VXLAN tunnel goes Down:This command also tracks reasons for tunnel Down events (e.g., underlay failure, peer unreachability), limited to the latest five incidents. This is consistent with Huawei’s troubleshooting capabilities.TRUE.

All optionsA, B, C, and Dare true, as they represent valid commands and approaches to troubleshoot VXLAN tunnel issues on Huawei CE switches.References:Huawei CloudEngine Series Switch Command Reference – VXLAN Commands; HCIP-Data Center Network Training – Troubleshooting VXLAN.

Traditional data center networks (DCNs) often suffer from single points of failure, limited scalability, and traffic bottlenecks. Both M-LAG and stacking address these issues, but their suitability for 24/7 service continuity differs.

M-LAG Benefits:M-LAG (Multi-Chassis Link Aggregation) on Huawei CE switches allows two devices to act as a single logical switch, providing active-active forwarding, high availability, and rapid failover (e.g., via peer-link synchronization). It supports non-stop service during device failures, making it ideal for 24/7 continuity.

Stacking Benefits:Stacking combines multiple switches into a single logical unit, sharing a control plane. While it improves scalability and simplifies management, a stack master failure can disrupt the entire stack unless redundancy is perfectly configured, potentially affecting service continuity.

Comparison:M-LAG’s decentralized design and real-time synchronization offer better fault isolation and recovery compared to stacking, where a master switch failure impacts the stack. Huawei documentation highlights M-LAG’s superiority for high-availability scenarios like 24/7 operations.

The statement isTRUE (A)because M-LAG is indeed a better choice than stacking for ensuring 24/7 service continuity due to its robust failover and redundancy features.References:Huawei CloudEngine Series Switch Configuration Guide – M-LAG vs. Stacking; HCIP-Data Center Network Training – High Availability Solutions.

EVPN (Ethernet VPN) is a control plane technology used with VXLAN to provide Layer 2 and Layer 3 services in data center networks, including Huawei’s implementations. EVPN routes are categorized into types, with Type 5 routes (IP Prefix routes) serving a specific purpose:

Type 5 Routes:These routes advertise IP prefixes and are used for inter-subnet routing, allowing communication between different VXLAN Virtual Network Identifiers (VNIs) or between VXLAN networks and external networks. They carry a Layer 3 VNI and IP prefix information, enabling routers or gateways to perform Layer 3 forwarding.

Usage Scope:Type 5 routes are not limited to hosts on a VXLAN network accessing external networks. They are also used by network devices (e.g., gateways, routers) within the EVPN domain to facilitate routing between subnets, including intra-VXLANcommunication. For example, a centralized gateway or distributed gateway can use Type 5 routes to route traffic within the data center or to external networks, not just host-initiated access.

The statement isFALSE (B)because Type 5 routes are not exclusively for hosts on a VXLAN network to access external networks; they support broader Layer 3 routing functions across the EVPN domain.References:Huawei HCIP-Data Center Network Training – EVPN Routing; CloudFabric EVPN Configuration Guide.