Free Huawei H12-921_V1.0 Practice Exam with Questions & Answers | Set: 2

Parsing: iNOF packets are TCP-encapsulated packets with TCP port numbers ranging from 10000 to 57999 and 19516 by default , which contains key iNOF information in the Data field of TCP packets. The client can send key iNOF information to the reflector through the iNOF packet, and the reflector summarizes it and then sends it to other clients. Through iNOF messages

The following types of information can be transmitted: Connection information: ▫ The iNOF reflector and the client need to exchange iNOF packets to establish an iNOF connection, similar to TCP connection. ▫ Domain configuration information: In the iNOF system, the device can manage the connected host through the zone, and after the iNOF domain configuration is completed on the iNOF reflector, it will pass through the iNOF The packet sends the domain configuration information to each client. ▫ Host dynamic information: When a new host connects to the client or leaves the client, the host will actively send LLDP packets to the client, and the LLDP will be recorded in the packet The change of neighbor information allows other devices in the iNOF system to perceive the host dynamic information. ▫ Interface Error-Down Information: Interface Error-Down is triggered when the iNOF device is triggered due to a PFC deadlock or a CRC error packet that reaches the alarm threshold After that, the iNOF packet will carry the interface Error-Down information, so that other devices in the iNOF system can quickly sense it and adjust the path information in time. •After the iNOF system is established, all devices in the system can perceive the changes of the access host at the first time, so that the information can be fed back to each intelligent lossless network function, and the relevant configuration can be intelligently adjusted, so that the network can finally achieve low latency, no packet loss, and high throughput performance.

Analysis: The concept of cloud platform exists only in the cloud-network integration scenario

Resolution: •ECN was originally defined in RFC3168 and is used to define network congestion identity. PFC is defined in 802. 1Qbb, similar to IEEE 802.3x Pause flow control mechanism, but supports independent operation based on each priority, precise control, so that different priorities do not affect each other. 802. 1Q has been evolving, 802. 1Qcz (CI, Congestion

Isolation) is a newly defined protocol standard led by Huawei to solve the problem of PFC Head of Line Blocking (HOLB).

Resolution: The DHCP Agent is a dynamically assigned IP address L3 Agent: Provides Layer 3 network functions and network address translation functions, allowing tenants' virtual machines to communicate with external networks. In a real-world deployment environment, multiple L3 Agents are typically required to run at the same time. DHCP Agent: Provides dynamic host configuration services to tenant networks, and is mainly used to dynamically assign IP addresses to virtual machines in tenant networks . Plug-in Agent: The plug-in agent needs to be deployed on each host running the hypervisor and provides local virtual switch configuration, depending on the specific plug-in type used. Common agents include ML2 plug-in agents, OpenSwitch agents, and Linux Bridge agents .

Resolution: VMs that are in different DVSs but belong to the same VLAN port group cannot communicate directly with the DVS

Analysis: Option D. Huawei NCEfabric does not support service automation orchestration for 3rd VAS in network virtualization scenarios.