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Industrial-grade 4G router TCP/IP network architecture 1. Layering of TCP/IP network system   TCP/IP (TransmissionControlProtocol/InternetProtocol), transmission control protocol/Internet protocol. It was developed by the defense advanced research projects agency in the 1970s, and was later integrated into UNIX and popularized. It emerged in the 1980s as the Internet's...

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The structure of 4G DTU The main function of DTU is to transmit data from remote devices back to the background center via wired/wireless. Different data transmission modes of DTU include all-network-connected DTU, GPRS DTU, WIFI DTU, CAN DTU and 4G DTU. Today, we will have a look at the structure and work flow of DTU.   To complete...

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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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工业路由器生成的每个LSP都有一个LSP标识符(LSPID)

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工业路由器生成的每个LSP都有一个LSP标识符(LSPID),LSP主要用来标识不同的LSP和生成LSP的源工业级路由器。就像OSPF中一样,每个LSA都使用通告工业4G路由器(通告此LSA的工业级4g路由器的RouterID)进行标识。每个LSPID都包括三个部分:

• SysID

• 伪节点标识符(PseudonodeID)

• LSP编号(LSPnumber)

其中SysID为路由器的系统ID,6字节长,用于标识生成此LSP的源工业3G路由器,与OSPF中的RouterID相似。

PseudonodeID长度为1字节,用于标识此LSP是否是由网络中的指定中间系统(DIS,DesignatedIntermediateSystem)为网络产生的伪节点LSP。当LSPID的PseudonodeID不为0时,则表示此LSP是由DIS为网络产生的伪节点LSP,如果PseudonodeID为0,则表示这是工业LTE路由器产生的一个常规LSP。

LSP编号长度也为1字节,用于标识此LSP是否被分片。在OSPF中,使用了多种类型的LSA来通告路由信息,而在IS-IS中,双卡路由器并不是用多种类型的LSP来通告路由信息,而是将所有工业无线路由器路由信息都封装到一个LSP中进行传输。当LSP多大时,也就是包含的工业级3G路由器路由信息过多时,数据包将被进行分段,这与我们熟悉的IP分段是一样的。对于任何的分片操作,都是由工业级无线路由器的CPU进行处理的,也就是执行进程交换,如果有过多的报文需要进行分片,那么将消耗大量的CPU资源,影响全网路由器的正常运行。对于分片的重组也是一样,也是要通过CPU进行处理,这样也会对接收分片的工业全网通路由器造成严重的后果。IS-IS为了避免这样的问题产生,采取了一种对LSP预分段的操作机制。路由器将较大的LSP预先拆分成很多更小的LSP后再扩散出去,而无需工业级全网通路由器在底层对其进行分片,这样可以降低由于分片产生的负面影响。当LSP编号为0时,表示这是LSP的一个分段,编号为1时,表示这是LSP的第二个分段,以此类推。

标签:全网通路由器    无线路由器

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