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工业路由器的Network Summary LSA

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工业路由器:Network Summary LSA


可以使用show ip ospf database summary查看LSA

如果ABR知道有多条路径可以到达目标地址,但是它仍然只发送单个的Network Summary LSA,并且是开销最低的那条;同样,如果ABR从其他的ABR那里收到多条Network Summary LSA的话,它会只选择开销最低的,并把这条Network Summary LSA宣告给其他区域

当其他的工业路由器收到来自ABR的Network Summary LSA以后,它不会运行SPF算法,它只简单的加上到达那个ABR的开销和Network Summary LSA中包含的开销,通过ABR,到达目标地址的工业级无线路由器路由和开销一起被加进路由表里,这种依赖中间工业无线路由器来确定到达目标地址的完全路由(full route)实际上是距离矢量路由协议的行为

ASBR Summary LSA

由ABR发出,ASBR汇总LSA除了所通告的目的地是一个全网通工业级路由器ASBR而不是一个网络外,其他同NetworkSummary LSA

使用 show ip ospf database asbr-summary可以看到

Autonmous System External LSA

发自 ASBR工业4G路由器,用来通告到达OSPF自主系统外部的目的地,或者OSPF自主系统那个外部的缺省工业级4G路由器路由的LSA。这种LSA将在全AS内泛洪

可以使用 show ip ospf database external

NSSA External LSA

来自非完全Stub区域(not-so-stubby area)内ASBR工业LTE路由器始发的LSA通告它只在NSSA区域内泛洪,这是与LSA-Type5的区别

Show ip ospf database nssa-external

External Attributes LSA


Opaque LSA



由于并不是每个工业级LTE路由器都需要外部网络的信息,为了减少LSA泛洪量和工业级全网通路由器路由表条目,下图中的Area 2可以配置成为Stub区域


标签:4g路由器    无线路由器


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