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Reflooding of MaxAge LSA

Dear community,

According to RFC2328 (OSPFv2) part 12.1.1 "When an LSA’s age first reaches MaxAge, it is reflooded." then in part 14 it also says that: "As a router ages its link state database, an LSA’s LS age may reach MaxAge. At this time, the router must attempt to flush the LSA from the routing domain. This is done simply by reflooding the MaxAge LSA just as if it was a newly originated LSA".

Can anybody explain these statements? Does it mean whenever that a LSA in any router reaches MaxAge it should flood the MaxAge LSA in network so that other routers delete the LSA from their databases? why not just letting other routers delete the LSA when they also reach the MaxAge?

Any help is appreciated,

Shahriar 

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