Huawei H12-841_V1.5 Dumps Questions Answers

In HCIP Datacom Campus Network VXLAN architecture, VXLAN tunnels are classified based onhow the tunnel endpoints are created and maintained, which is referred to as the VXLAN tunnel creation mode. According to Huawei VXLAN design principles, there aretwo valid VXLAN tunnel types: static VXLAN tunnels and dynamic VXLAN tunnels.

Astatic VXLAN tunnelis manually configured by an administrator. In this mode, the source VTEP IP address, destination VTEP IP address, and related parameters are explicitly specified on devices. Static VXLAN tunnels are typically used in small-scale networks or test environments where the number of VTEPs is limited and network topology is simple. However, static configuration lacks scalability and flexibility, making it unsuitable for large campus fabrics.

Adynamic VXLAN tunnelis automatically created based on control-plane learning mechanisms, such asBGP EVPN. In this mode, VTEPs learn remote VTEP IP addresses dynamically through EVPN route advertisements (for example, Type 3 routes). When a remote VTEP becomes reachable at the underlay Layer 3 level, the VXLAN tunnel is automatically established without manual intervention. This mode is widely used in modern campus and data center networks due to its scalability and automation capabilities.

Options A and D are incorrect becausestatelessandstatefulare not official VXLAN tunnel creation classifications in Huawei’s VXLAN implementation. VXLAN itself is an encapsulation mechanism, and tunnel state is not categorized in this manner.

Therefore, the correct VXLAN tunnel types based on creation mode arestatic VXLAN tunnels and dynamic VXLAN tunnels.

In Huawei VXLAN implementations described in HCIP Datacom Campus Network documentation, the relationship between aVXLAN Network Identifier (VNI)and aBridge Domain (BD)is aone-to-one (1:1) mapping. Each BD represents a Layer 2 broadcast domain in the VXLAN overlay network, and each BD is uniquely identified by a single VNI.

The VNI is carried in the VXLAN header and is used by VTEPs to determine which virtual Layer 2 network the encapsulated traffic belongs to. When a packet is received, the VTEP decapsulates the VXLAN header and forwards the traffic to the corresponding BD based on the VNI value. Because of this mechanism, a single BD can only be associated with one VNI, and a VNI can only represent one BD.

This strict 1:1 mapping simplifies traffic forwarding, MAC address learning, and broadcast, unknown unicast, and multicast (BUM) traffic handling. It also ensures clear isolation between different virtual networks, which is essential for multi-tenant campus and data center environments. Allowing multiple BDs to map to one VNI or vice versa would break traffic isolation and complicate forwarding logic.

Therefore, Huawei VXLAN design enforces a one-to-one relationship between VNIs and BDs, making1:1the correct answer.

In a centralized VXLAN gateway architecture, all inter-subnet traffic is forwarded to a centralized Layer 3 gateway, typically deployed on a core or aggregation device. This design simplifies network planning, gateway configuration, and policy enforcement because routing, security, and traffic control are all handled at a single centralized point. From an operational perspective, deployment and management are straightforward, which makes centralized gateways suitable for small- to medium-sized campus networks or environments with limited endpoints.

However, according to HCIP Datacom Campus Network documentation, this architecture introduces scalability limitations. Since the centralized gateway performs Layer 3 forwarding for all VXLAN segments, it must maintain ARP entries for every terminal in the network. As the number of endpoints increases, the ARP table on the Layer 3 gateway grows rapidly. Hardware resources such as memory and processing capacity limit the maximum number of ARP entries that can be supported.

In large-scale campus scenarios with a high density of terminals—such as universities, hospitals, or enterprise office campuses—this ARP scalability bottleneck can impact performance and stability. Excessive ARP entries may lead to increased CPU utilization, delayed ARP resolution, and reduced forwarding efficiency. For such environments, HCIP Datacom recommends distributed VXLAN gateways, which distribute ARP and routing responsibilities across multiple devices. Therefore, the statement is correct, and the centralized VXLAN gateway is not suitable for scenarios with a large number of terminals.