EIGRP Route Goes Active - How? Why? What Happens Next?

What happens when the path to a route fails? What if there is no feasible successor? What is a query boundary? Learn the answer to this question and more about Cisco's Enhanced Interior Gateway Routing Protocol (EIGRP) in this video.
If you are currently studying for your Cisco CCNP exam (Encore 350-401) study with us! This topic relates to Chapter 7 - EIGRP.
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[@gregc2479]

At 1:50 are you saying that if the receiving routers are part of the successor path then they’ll forward the query downstream because that route is bad?

[@NetworkDirection]

Let's say a router receives a query for a route. It can either respond directly, or forward that query out. If this router received this query from the router that it thinks is the successor, then it doesn't have a good response for the query. That means it needs to forward the query to other routers, to see if they have a better path. However, if the router that received the query has a valid path to the destination, it can respond to the original query with this information