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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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工业级无线路由器OSPF协议常见故障

文章目录 : 产品文章

邻居及邻接关系出现问题大致情况如下

1. OSPF没有在接口上启用,或者一条网络工业路由器配置命令错误或丢失

2. 不匹配的Hello或者计时器,E位,区域ID,认证类型或者网络掩码

3. 访问列表错误配置,可能正在阻塞全网通工业级路由器OSPF hello包

4. 虚拟链路和末节设置不匹配

5. 接口被定义为passive-mode

6. 不匹配的认证类型

7. 不匹配的认证密钥

8. 第2层停机

9. 没有在全网通工业路由器NBMA上定义网络类型

10. FR或dialer缺少broadcast关键字

工业级全网通路由器OSPF停滞在INIT状态【4g路由器

检查方法如下:

1. 一端正在阻塞hello分组

2. 一端NAT转换了工业全网通路由器OSPF hello 包

3. 一端的组播能力被破坏

4. 肯定是一个2层的问题

5. Dialer或FR缺少broadcast

6. 工业级路由器发送hello,但没有收到响应

7. 邻居hello在NBMA云团中消失

8. 工业无线路由器ACL或者某些2层原因拒绝了hello包

OSPF停滞在Exstart/Switching状态

检查方法如下:【全网通4g路由器

1. MTU不匹配

2. 邻居工业4G路由器RID是一致的

3. 单播被破坏

在一个高度冗余的网络中,Frame/ATM环境中错误的VC/DLCI映射

MTU的问题,不能使用超过某长度的分组

ACL阻塞单播

NAT正在转换单播分组

4. 在工业级4G路由器PRI和BRI/dialer和网络类型之间是点到点的

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