ITM11A8XJ036645通用电气GE模块

ITM11A8XJ036645通用电气GE模块

1、工作环境方面的考量：包括温度范围、EMC电磁兼容性、防护等级、安装方式和电源等。商用以太网交换机设计哪些不适合工业交换机的环境，例如具有极限温度、高振动以太强电磁噪声的环境。

2、选用网管型还是非网管型交换机：如果网络比较简单，可以选用即插即用的非网管型交换机；如果为了将来维护方便，可能需要选用网管型，只有网管型交换机才能做到环型的拓朴连接。

3、还需要满足相关的工业标准：比如船用的交换机应符合船结构的标准；如果有危险场合的应用，则要符合相应的认证标准，轨道交通和公路等交通行业也有自己的标准。

交换机选购时，性能方面除了要满足RFC2544建议的基本标准，即吞吐量、时延、丢包率外，随着用户业务的增加和应用的深入，还要满足了一些额外的指标，如MAC地址数、路由表容量(三层交换机)、ACL数目、LSP容量、支持VPN数量等。 

1, the working environment considerations: including temperature range, EMC electromagnetic compatibility, protection level, installation mode and power supply. The commercial Ethernet switch design is not suitable for the environment of industrial switches, such as the environment with limit temperature, high vibration and strong electromagnetic noise.

2, choose network management or non-network management switch: if the network is relatively simple, you can choose plug and play non-network management switch; If in order to facilitate future maintenance, it may be necessary to choose the network management type, only the network management type switch can achieve the ring topology connection.

3, also need to meet the relevant industrial standards: for example, the Marine switch should meet the ship structure standards; If there is a dangerous application, it must meet the corresponding certification standards, and the transportation industry such as rail transit and highway also has its own standards.

When purchasing a switch, in addition to the basic standards recommended by RFC2544, such as throughput, delay, and packet loss rate, with the increase in user services and application, the switch must meet some additional performance indicators, such as the number of MAC addresses, routing table capacity (Layer 3 switch), number of ACLs, LSP capacity, and number of VPNS supported.