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EIGRP: Will a backup route arrive in the event of primary path out failure?

Last Modified: 2020-02-08
I'm in a new gig and I want to understand what happens if a site's Internet link goes down what takes over for their default route.
The routing protocol is EIGRP.


So the switches in the OFFICE are learning their path to the Internet from the Cisco ASA which advertises
a default route inward via EIGRP. The ASA learned it has the default via OSPF from an edge router
outside of it. My guess is that the DATA CENER's default route would propagate over the WAN to
the OFFICE in the event the Cisco ASA stopped advertising the default route inward.

How could I find out the behavior of the lost default route without causing an outage?

Thank you.
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