Try to configure a default static route pointing out the S1 interface and then redistribute only this static route with a relevant ROUTE MAP in the EIGRP instance. If the s1 interface is down the default route will not been inserted in routing table and will not been advertised to EIGRP domain.
I have already tried this and it works!
Of course you can use the default route with object tracking for more accurate results!
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...