Pass the Huawei HCIE-Data Center H12-921_V1.0 Questions and answers with CertsForce

The OpenStack architecture includes not only the components of computing, network, and storage, but also other module components such as orchestration and shared services

The OpenStack computing resource architecture adopts a multi-level architecture, from top to bottom: Region and Host Aggregate 、AZ

OpenStack controls and manages corresponding resources through the collaborative interaction of various components

OpenStack uses Ceilometer components to monitor business modules, including: Cinder, Neutron , Nova, Swift、 Glance

Huawei data center switches support the 8021p priority-based PFC function

Huawei data center switches support the PFC function based on DSCP priority

You need to plan a separate priority queue for RoCE traffic and enable the PFC feature

In a VXLAN lossless network, switching devices can directly schedule traffic based on the priority of the IP header in the inner layer of VXLAN

Multi-host sharing is inconvenient

Limited scalability, up to 255 nodes

Direct connection to the CPU is not supported

Can't pull it far

VRF

VNI

VTEP

NVE

Logic Router

IGW routing table

TransitRouter

External Gateways

RDMA requires the host CPU to participate in multiple copies of protocol stack memory, resulting in a sustained high load on the CPU

Unlike traditional TCP socket network interfaces, RDMA bypasses the operating system kernel and implements kernel bypass

RDMA technology is widely used in scenarios such as HPC, AI, and storage, reducing CPU load and processing latency, and greatly improving application performance

RDMA enables peripherals (such as network cards) to directly access the memory of the remote host

Static routes

BGP

Policy-based routing

OSPF

Indicates that the network between the source node and the destination node is unreachable, resulting in the failure to execute the detection task

The probe cannot be executed because the source node cannot be found

Indicates that the probe is successful and the path is normal

Indicates that the probe task has been executed, but the packet forwarding fails due to incomplete or interrupted routes

3

4

2

1

You can use it to view the actual physical path of a specific service flow between VMs

You can configure multiple probe packets to be sent at a time

It can be used to detect whether service flows between physical machines are interrupted

Paths can be filtered based on five-tuple information