Equipment selection refers to determining the model and specification of equipment according to the production capacity and technical scheme of the proposed project.The equipment selection is closely related to the technical scheme, and the two complement each other.Without advanced technical solutions, it is difficult for advanced equipment to play its due role;Without advanced equipment, it is impossible to realize advanced technology.However, in the case of having to acquire technology separately, equipment selection should be subject to technical decisions.[1]
Chinese name
Equipment Selection
Basis
According to production process requirements and market supply
Brand
Determine the brand according to the user's tolerance
All network equipment shall be from the same manufacturer as far as possible, so as to have advantages in equipment interconnection, protocol interoperability, technical support and price.From this perspective, manufacturers with complete product lines, strong technical certification team and high product market share are the first choice for network equipment brands.Its products have passed the inspection of more users, and the product maturity is high. Moreover, these manufacturers have frequent shipments, large production volume, and complete quality assurance system.AsSystem integrator, should not rely on any one's products, should be able to fairly evaluate various products according to demand and cost, select the best.Before formulating the network scheme, the brand of network equipment should be determined according to the user's affordability.
Scalability considerations
On the networkhierarchical structureIn the middle, a certain capacity should be reserved for the selection of backbone equipment for future expansion, while low-end equipment is sufficient because low-end equipmentDevice updateFast and easy to expand.Due to the complex structure of enterprise networkSwitchIt can connect all series of interfaces, such as optical port and electrical port, 100MGigaHewanMegaPorts, multimode fiber interfaces, long-distance single-mode fiber interfaces, etc.Its switching fabric should also be able to flexibly expand the capacity according to the network expansion.Its software shall have independent intellectual property rights, and its subsequent research and development and upgrading shall be guaranteed to support future new business.
reliability
As core and backbone networks are often upgraded, their importance is self-evident, and once paralyzed, it will have a huge impact.
Manageability
The degree of manageability of a large network directly affects the operation cost and service quality.Therefore, all nodes should be manageable, and a strong and concisenetwork management systemIt can monitor and manage the network traffic and operation status in an all-round way.
Security
With the popularization and development of the network, various attacks are also threatening the security of the network.Not just accessSwitchBackbone switches should also consider security issues, such asaccess control 、bandwidthControl, so as to effectively control the infringement of bad business on the entire backbone network.
QoS control capability
With more and more multimedia service streams (such as voice, video, etc.) on the network, people put forward higher requirements on the core switching node, not only to be able toLine speed switchingAccording to the characteristics of different business flowsbandwidthCarry out effective control to ensure the smoothness of important business and time sensitive business.
Standardization and openness
Since the network is often an environment with multiple manufacturers' equipment, the selected equipment must be able to support open standards and protocols commonly used in the industry, so that it can effectively interoperate with other manufacturers' equipment.
Scheme selection
Announce
edit
Mainly based on the overall network design requirements, according to the actual networkbandwidthPerformance requirements, port types, andPort densityModel selection.If it is an old network transformation project, users should retain and extend their investment in the original network equipment as far as possible to reduce the waste of capital investment.
In order to maximize the input and output of funds and maintain the system operation with low cost and less personnel input, many key businesses will be operated after the network is opened, so the system is required to have high reliability.The reliability of the whole system is mainly reflected in the reliability of network equipment, especially GBEbackbone switch Reliability and line reliability.As backbonenetwork node，central exchange. Convergence switches and plant switches must be able to provide a completely non blocking multi-layer switching performance to ensure smooth business.
