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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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Dual SIM Router vs. Dual Radio Router Projects are looking to save their enterprises time and money ask us this very often: “When would I need to use dual SIMs, and in what situations should I consider dual radio dual sim router?” In order to make this clear, let’s take a quick look at the dual SIM and dual SIM dual radio module functionality. Dual...

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伊林思:关于工业路由器OSPF末节区域

文章目录 : 产品文章

工业路由器OSPF末节区域

如果工业路由器路由增加,就意味着LSA的增加,有时,在一个末梢网络中,许多路由信息是多余的,并不需要通告进来,因为一个OSPF区域内的所有工业级路由器都能够通过该区域的ABR去往其它OSPF区域或者OSPF以外的外部网络,既然一个区域的工业无线路由器只要知道去往ABR,就能去往区域外的网络,所以可以过滤掉区域外的工业级无线路由器路由进入某个区域,这样的区域称为OSPF末节区域(Stub Area);一个末节区域的所有路由器虽然可以从ABR去往区域外的网络,但路由器上还是得有指向ABR的路由,所以末节区域的工业4G路由器只需要有默认路由,而不需要明细工业级3G路由器路由,即可与区域外的网络通信,根据末节区域过滤掉区域外的不同工业3G路由器路由,可将末节区域分为如下四类:

Stub Area(末节区域)

Totally Stub Area(完全末节区域)

Not-so-Stubby Area(NSSA)

Totally Not-so-Stubby Area(Totally NSSA)

各类型的特征如下:4g路由器

Stub Area(末节区域)

在Stub Area(末节区域)下,ABR将过滤掉所有外部路由进入末节区域,同时,末节区域内的工业级4G路由器也不可以将外部工业TD-LTE路由器路由重分布进OSPF进程,即末节区域内的全网路由器不可以成为ASBR,但其它OSPF区域的路由(Inter-Area Route)可以进入末节区域,由于没有去往外部网络的路由,所以ABR会自动向末节区域内发送一条指向自己的默认全网通路由器路由,如下图:

Totally Stub Area(完全末节区域)

在Totally Stub Area(完全末节区域)下,ABR将过滤掉所有外部工业LTE路由器路由和其它OSPF区域的路由(Inter-Area Route)进入完全末节区域,同时,末节区域内的工业级LTE路由器也不可以将外部路由重分布进OSPF进程,即完全末节区域内的全网工业级路由器不可以成为ASBR,由于没有去往外部网络的全网工业路由器路由,所以ABR会自动向完全末节区域内发送一条指向自己的默认路由,如下图:

可以发现,末节区域与完全末节区域的不同之处在于,末节区域可以允许其它OSPF区域的全网通工业级路由器路由(Inter-Area Route)进入,而完全末节区域却不可以。

Not-so-Stubby Area(NSSA)

在Not-so-Stubby Area(NSSA)下,ABR将过滤掉所有外部路由进入末节区域,同时也允许其它OSPF区域的路由(Inter-Area Route)进入NSSA区域,并且路由器还可以将外部路由重分布进OSPF进程,即NSSA区域内的工业全网通路由器可以成为ASBR,由于自身可以将外部网络的工业级全网路由器路由重分布进OSPF进程,所以ABR不会自动向NSSA区域内发送一条指向自己的默认路由,但可以手工向NSSA域内发送默认全网通工业路由器路由,并且只可在ABR上发送默认路由。全网4g通路由器

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