2026 Die neuesten ITZert H12-893_V1.0 PDF-Versionen Prüfungsfragen und H12-893_V1.0 Fragen und Antworten sind kostenlos verfügbar: https://drive.google.com/open?id=1OZcC-glwvl9imlesaJF-QkkW6UDxR64R
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| Section | Objectives |
|---|---|
| Topic 1: Data Center Switching Technologies | - Ethernet Switching in Data Centers
|
| Topic 2: VXLAN Technology | - Overlay Networking
|
| Topic 3: SDN and Network Automation | - Software Defined Networking
|
| Topic 4: Data Center Network Fundamentals | - Data Center Architecture Overview
|
| Topic 5: Network Security and Reliability | - Data Center Security Mechanisms
|
| Topic 6: O&M and Troubleshooting | - Operations and Maintenance
|
| Topic 7: Data Center Routing | - Routing Protocols in DC Environment
|
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75. Frage
The underlay routing protocol has already converged, but one VTEP cannot establish EVPN sessions with another. Which prerequisite should be verified first?
Antwort: B
Begründung:
Even with complete IP connectivity, EVPN requires operational MP-BGP neighbor relationships.
Without successful BGP session establishment, overlay routes cannot be exchanged, preventing endpoint discovery and VXLAN communication.
76. Frage
Assume that a VXLAN tunnel is monitored on a Huawei CE series switch and that the tunnel status is Down or the tunnel fails to be dynamically established. In this scenario, which of the following statements are true about how to check the cause of the fault? (Select All that Apply)
Antwort: A,B,C,D
Begründung:
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 options A, B, C, and D are true, as they represent valid commands and approaches to troubleshoot VXLAN tunnel issues on Huawei CE switches.
77. Frage
Which of the following statements is false about the routing design for the underlay network during DCN deployment?
Antwort: D
Begründung:
The underlay network in Huawei's DCNs (e.g., CloudFabric) uses routing protocols like OSPF or BGP. Let's evaluate each statement:
A . OSPF is recommended for small and midsize DCNs, and EBGP is recommended for large and midsize networks: This is true. OSPF suits smaller networks (<300 switches), while EBGP is better for large networks (>300 switches) due to scalability. TRUE.
B . When OSPF is used on the underlay network, only single-area OSPF can be deployed: This is false. Multi-area OSPF can be deployed to manage larger networks, reducing routing table size and improving stability, a common practice in Huawei DCNs. FALSE.
C . Compared with OSPF, EBGP involves fewer calculations and offers better scalability: This is true. EBGP's path-vector nature requires fewer computational resources than OSPF's link-state calculations and scales better with large topologies. TRUE.
D . When EBGP is used on the underlay network, each group of active-active leaf nodes is deployed in an AS: This is true. In EBGP designs, active-active leaf nodes (e.g., M-LAG) are typically in the same Autonomous System (AS) to simplify routing, using iBGP or route reflectors. TRUE.
Thus, B is the false statement because multi-area OSPF is supported, not just single-area.
78. Frage
Which of the following statements is false about VXLAN tunnel establishment?
Antwort: C
Begründung:
VXLAN (Virtual Extensible LAN) tunnels are used to encapsulate Layer 2 traffic over a Layer 3 network, a key component in Huawei's CloudFabric data center solutions. Let's evaluate each statement:
A . A VXLAN tunnel is identified by a pair of VTEPs: This is true. A VXLAN tunnel is identified by the pair of VXLAN Tunnel Endpoint (VTEP) IP addresses (local and remote), along with the VNI (VXLAN Network Identifier). This ensures unique tunnel identification. TRUE.
B . After a tunnel is established, if one end of the tunnel goes Down, the other end may not go Down: This is true. VXLAN tunnels are unidirectional, and the status of one end does not automatically affect the other unless the underlay network connectivity (e.g., Layer 3 reachability) is lost. The remote VTEP may remain operational if it can still encapsulate/decapsulate traffic. TRUE.
C . For a static tunnel, you need to manually configure the local and remote VNIs: This is true. In a static VXLAN tunnel, administrators must manually configure the VNI and VTEP IP addresses on both ends, as there is no dynamic control plane (e.g., BGP EVPN) to automate the process. TRUE.
D . Dynamic tunnels depend on EVPN Type 5 routes to transmit information: This is false. Dynamic VXLAN tunnels rely on BGP EVPN as the control plane, but Type 5 routes (IP Prefix routes) are specifically used for advertising host IP routes and external network routes, not for general tunnel establishment. Dynamic tunnel setup primarily uses Type 2 (MAC/IP Advertisement) and Type 3 (Multicast) routes to exchange VNI and VTEP information. Type 5 routes are relevant for Layer 3 routing, not the initial tunnel setup. FALSE.
Thus, D is the false statement because dynamic tunnels depend on EVPN Type 2 and Type 3 routes, not Type 5, for initial establishment.
79. Frage
A server migrates from one rack to another while remaining in the same VNI. Which EVPN capability minimizes service interruption during this migration?
Antwort: B
Begründung:
When a workload moves, the new VTEP advertises updated MAC/IP reachability through EVPN.
Remote devices quickly update forwarding entries, reducing disruption without relying on manual reconfiguration or spanning-tree events.
80. Frage
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2026 Die neuesten ITZert H12-893_V1.0 PDF-Versionen Prüfungsfragen und H12-893_V1.0 Fragen und Antworten sind kostenlos verfügbar: https://drive.google.com/open?id=1OZcC-glwvl9imlesaJF-QkkW6UDxR64R