Hello, looking for some advice on what config setting I am missing...
Sites A, B and C are all connected via DMVPN with 2 separate "clouds", Tun100 and Tun200 on each site. Running EIGRP for route distribution amongst all sites. Each site has 2 routers one has Tun100 and the other has Tun200. The routers are connected to the core routing switch at each site via a /30 subnet for each router.
Tun100 and Tun200 between Site A and B is down. Tun200 between Site B and Site C is down. Tun100 between Site A and Site C is down.
This results in there being a path between Site A and Site B such that Site A connects to C on Tun200 and then in turn could connect to B on Tun100.
However, EIGRP doesn't seem to distribute this routing path. I can't figure out why it won't distribute that route short of the two DMVPN routers are not EIGRP neighbors of each other, so it won't redistribute routes that way. But I am not certain. An example of the eigrp config is below. The 10.2.255.0 network is the router<-->core switch at the local site. 10.255.252 = Tun100 and 10.255.253 = Tun200 address space.
Any ideas on what I am missing that would help push this indirect route into our routing table?
router eigrp 100 network 10.2.255.0 0.0.0.3 network 10.255.252.0 0.0.0.255 network 10.255.253.0 0.0.0.255 passive-interface default no passive-interface Ethernet0/1 no passive-interface Tunnel100 
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