![]() The link between the two routers is of low quality, allowing only enough packets through to stay the neighbor relationship intact, but bad sufficient to permit the replies through. The queried router's memory is corrupt or otherwise not able to permit the router to answer the query. The queried router's resources are unavailable, generally because of high CPU utilization. The link is unidirectional, therefore the query can't possibly be answered. From experience, I will tell you just how troubleshooting SIA routes is even more of an art form when compared to a science, though there are four main reasons a route becomes SIA : Sometimes that does not happen, though, and also the route becomes SIA - Stuck In Active.Ī route becomes SIA each time a query goes unanswered for so long the neighbor relationship is reset. Each time a route is Passive (P), which means it is not being recalculated then it‘s a usable route.Ī route shown as Active will probably be there for a really short period of the time you repeat the command, hopefully, that Active route has gone Passive. In case a route shows as Active inside the EIGRP topology table, that implies that DUAL happens to be calculating that route, then it‘s currently unusable. That is what it is that we want, right? Active routes sound good, right? ![]() A preferred misconception is that many of us want these routes to possess an "A" next to them - so they are active. View the EIGRP topology table using the show ip eigrp topology command, and you may see a code next to every successor and feasible successor.
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