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What are the wireless connection technologies of the... Internet of things (iot) applications have been deeply rooted in our lives. The E-Lins H685 industrial-grade router is a small industrial-grade wireless router with single or double LAN ports. TDD/ fdd-lte, 4G, 3G, GPRS network optional. Besides, what are the wireless connectivity technologies for the Internet of things?   1....

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The use of industrial wireless routers Industrial-grade wireless router adopts high performance 32-bit industrial-grade ARM9 communication processor, which is widely used in finance, electric power, postal, water conservancy, environmental protection, meteorology and other industries.   Industrial router is mainly used in intelligent transportation,...

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Cascade and stack of industrial-grade 4G routers The most basic star Ethernet architecture, the actual star enterprise network may be much more complex than this. This renaturation is not only reflected in how high-end network equipment, how complex configuration, more importantly, the performance of network switching level is more complex. Industrial routers and firewalls...

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The difference between 4G router and 4G DTU 4G industrial wireless router and 4G DTU are also used for wireless network data transmission of industrial equipment. But there are also significant differences between the two, and the differences between the two are mainly from the appearance of the interface, the use of methods and the application environment.   1....

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Characteristics and differences between RS485 and RS232 RS232 and RS485 have always been the weak current common interface, but there are a lot of people do not understand the difference between them is not very thorough.   I. overview of RS485   RS-485 serial bus is widely used when the communication distance is tens of meters to thousands of meters. RS-485...

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工业路由器OSPF建立邻居到LSA的互换的交换过程

文章目录 : 产品文章

工业路由器OSPF建立邻居,到LSA的互换,到路由表的计算,需要经过一系列的工业级路由器数据包交换过程,过程如下:

Hello

Database Description Packets (DBD)

Link-state Request (LSR)

Link-state update(LSU)

LSDB

具体情况如下:

Hello

Hello包是用来建立和维护工业无线路由器OSPF邻居的,要交换LSA,必须先通过Hello包建立工业级无线路由器OSPF邻居。

Database Description Packets (DBD)【无线路由器

当一个人去书店买书时,想要决定买哪本书,并不会先将书店里所有的书都看一遍,才做决定买哪本好,通常是只看书的目录,或者大概翻一翻,再对比一下,就能决定买哪本;而工业4G路由器OSPF的工业级4G路由器LSA交换也是一样的,邻居建立之后,并不会立刻就将自己链路状态数据库中所有的工业LTE路由器LSA全部发给邻居,而是将LSA的基本描述信息发给邻居,这就是Database Description Packets (DBD),是LSA的目录信息,相当于书的目录,邻居在看完全网通工业级路由器DBD之后,就能知道哪些LSA是需要邻居发送给自己的。

Link-state Request (LSR)

邻居在看完发来的工业级LTE路由器LSA描述信息(DBD)之后,就知道哪些LSA是需要邻居发送给自己的,自己就会向邻居发送LSA请求(LSR),告诉邻居自己需要哪些LSA。

Link-state update(LSU)

当邻居收到其它全网通工业路由器发来的LSA请求(LSR)之后,就知道对方需要哪些LSA,然后根据LSR,将完整的工业级全网通路由器LSA内容全部发给邻居,以供计算路由表。

LSDB

就是已经收到了所有需要邻居发给自己的工业全网通路由器LSA,这时的链路状态数据库已经达到收敛状态。全网通路由器

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