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What is M2M? As is known to all, besides providing more broadband speed and quality, 5G is characterized by the application of the Internet of things (IoT) from the demand and design stage. In order to adapt to different applications, mobile communication technology with no wiring, high coverage and high reusability has become an important...

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The similarities and differences between industrial... 1. definition of industrial 4G router and industrial switch   Industrial 4G router:   Industrial 4G router is a network device responsible for path finding. It provides users with communication by finding the least communication from multiple paths in the interconnection network. Industrial 4G router...

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4g router features of E-lins Technology With the development of new communication technologies and the continuous improvement of network efficiency and function of wireless communication, 4G has been widely used. 4G industrial-grade wireless routers are playing an increasingly important role in the applications of various industries, and the price is getting...

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E-Lins Industrial router applications Industrial-grade routers as Internet network layer communication equipment application in all walks of life, brought a lot of convenience for our industry. "E-Lins" introduce the application of industrial router scenario analysis.   1 The self-service terminal network   E-lins industrial router networking...

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Classification of 4G industrial routers There are many types of 4G industrial routers, which can be divided into different categories from different perspectives. Different types of 4G industrial routers can be used in different environments. The following sections classify the 4G industrial routers from different perspectives. According to the performance From...

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工业路由器使用Hello分组来建立和维护节点的邻接关系

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  OSPF协议使用Hello分组来建立和维护节点的邻接关系。邻接关系是运行OSPF协议的工业EVDO路由器交换路由和选择数据的基础。运行OSPF协议的工业路由器只有通过Hello分组才能发现本区域中其他OSPF协议节点。工业路由器通过交换Hello分组在邻接节点间建立通信。Hello分组通过在OSPF协议分组头后附加内容来定义一系列子分组结构。这些子分组统称Hello分组。

  Hello分组通过在运行OSPF协议的接口上启动多播传输来发送。根据RFC1700和RFC2328,Hello分组的目的地址是所有OSPF路由器:224.0.0.5。该多播地址对应的以太网链路层MAC地址是0×01-00-5e-00-00-06.采用多播传输而不是广播传输可以使局域网上非OSPF节点免受OSPF协议数据干扰。

  在缺省条件下,Hello分组每10s发送一次。该发送间隔可以协商。定期发送的Hello分组用作心跳:告诉网络上其他工业TD-LTE路由器该OSPF路由器接口处于活跃状态。如果OSPF节点连续4次无法发送Hello分组,则所有邻居会认为该OSPF节点已瘫痪。在缺省条件下,邻接关系取消时间为4*10s=40s。

  标签:无线路由器   4g无线路由器

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