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The advantage of using wireless data transmission module... Data transmission can be simply divided into two major types: wired (including the installation of optical cables, cables or leased telecommunication lines) and wireless (including the establishment of dedicated wireless data transmission system or the borrowing of CDPD, GSM, CDMA and other public network information platforms).     In...

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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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对于过滤工业级路由器路由有哪些特别注意的地方

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如果将不必要的工业路由器路由发入错误的协议,可能导致路由环路或次优路径,因此,可以采用过滤手段将相应路由过滤掉,对于过滤工业级路由器路由,有以下特别注意的地方:4g无线路由器

工业无线路由器路由过滤可以通过Distribute-List来实现,Distribute-List可以适用的协议和方向有:

RIP(距离矢量工业级无线路由器路由协议)

可适用于in方向和out方向。

EIGRP(距离矢量工业4G路由器路由协议)

可适用于in方向和out方向。

OSPF(链路状态路由协议)

在OSPF本协议进程内,只适用于in方向,只对自己的路由表生效,无法影响邻居的路由表;在除OSPF之外的其它协议进程下,可用于out方向,在于将OSPF重分布进其它工业全网通路由器路由协议时做过滤,此过滤称为进程过滤,不仅适用于OSPF协议重分布进其它协议时适用,同样适用于其它协议重分布进OSPF或其它协议之间重分布。

Route-Map可以单独用在工业级4G路由器路由重分布时控制和过滤路由。4g路由器

除了在必要时,将路由过滤掉之外,当需要在不同协议或不同AD值之间调整路优选择优先权时,可以通过修改工业级3G路由器路由协议默认的AD值来实现,修改AD值可以是基于整个协议的修改,将对协议内所有路由条目生效,也可以对特定全网通工业路由器路由修改;如果只是需要对特定路由修改AD值,则需要调用ACL或Prefix-Lix来匹配特定路由,除此之外,还要定义工业级全网通路由器路由去往目的地的下一跳地址,RIP和EIGRP都需要在对特定全网通工业级路由器路由调整AD值时定义路由下一跳地址,而对于OSPF,其LSA中并没有明确写明去往目的地的下一跳地址,因为这个地址需要OSPF通过LSA计算后得知,所以在OSPF下对特定工业3G路由器路由调整AD值时定义的路由下一跳地址为产生该LSA的Router-ID。

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