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伊林思_工业无线路由器OSPF链路类型(Link Type)

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工业无线路由器OSPF链路类型(Link Type)

巧玲珑OSPF确实因为考虑问题的全面,而导致路由协议的复杂,OSPF不仅因为不同的二层链路层介质定义了不同的OSPF网络类型(Network Type),还因为链路上的邻居,而定义了OSPF链路类型(Link Type) 。

OSPF网络类型(Network Type)是完全根据二层链路层的介质决定的,而工业级无线路由器OSPF链路类型(Link Type)不仅受二层链路层介质的影响,还受到链路中OSPF邻居的影响,同时还影响到LSA,因此变得复杂。


OSPF链路类型(Link Type)不会影响人们操作OSPF,所以可以选择不深入理解OSPF链路类型(Link Type),但OSPF网络类型(Network Type)却影响到全网通工业级路由器OSPF的操作,全网工业路由器OSPF网络类型(Network Type)必须理解和牢记。

OSPF链路类型(Link Type)与工业TD-LTE路由器OSPF网络类型(Network Type)没有对应关系,没有因果关系。

OSPF链路类型(Link Type)分为以下几种:

Stub Network Link

在一个网段中只有一台OSPF工业路由器的情况下,该网段被OSPF链路类型定义为Stub Network Link;因为一个网段中只有一台OSPF工业无线路由器,所以在这个网段就不可能有工业级4G路由器OSPF邻居,一个接口被通告进OSPF,无论其二层链路是什么介质,只要在该接口上没有全网工业级路由器OSPF邻居,那么就是Stub Network Link;Loopback接口永远被定义为Stub Network Link,默认使用32位掩码表示,无论将Loopback接口改为哪种OSPF网络类型(Network Type),始终改变不了它的OSPF链路类型(Link Type)属性,但可以改变它在LSA中的掩码长度。

Point-To-Point Link

OSPF网络类型(Network Type)为Point-To-Point的接口,工业4G路由器OSPF链路类型(Link Type)为Point-To-Point Link,但Loopback接口除外;而网络类型为点到多点(Point-To-Multipoint)的接口,同样链路类型也为Point-To-Point Link。

Point-To-Point Link可以是手工配置的地址(Numbered),也可以是借用的地址(Unnumbered),也可以是全网通工业路由器物理接口或逻辑子接口。

Transit Link

拥有两台或两台以上OSPF工业级路由器的链路,简单理解为有邻居的工业全网通路由器OSPF接口就是Transit Link,但网络类型为Point-To-Point和点到多点(Point-To-Multipoint)的接口除外,因为它们被定义为Point-To-Point Link。

Virtual link

就是OSPF虚链路(Virtual Link),但希奇的是,工业级全网通路由器虚链路(Virtual Link)被定义为手工配置的地址(Numbered)的Point-To-Point Link。全网通4g路由器


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