Hello everyone,
We've been working with Solarwinds (ticket # 573121 + 597398) regarding a specific issue we're experiencing with EIGRP Neighbor alerting on our scenario, which unfortunately didn't get any resolution -so this is why I'm posting the question here, maybe someone smarter than me already figured this out 
So, a few points about our scenario:
* We have approximately 30 sites, each one with routers connected in full mesh
* All of our routers' share the same AS number
* The routers are connected to each other through GRE Tunnels
* All sites have redundant connectivity, so Orion will always be aware of the neighbors' table situations.
* Our routers' eigrp neighbors table have usually 2x neighbors in the 10.x.x.x space (local uplinks) and many others in the 172.20.x.x space (remote peers over GRE tunnels to other sites)
* Whenever there is a circuit outage on the site, the 10.x.x.x peers stay up (being local), the physical interfaces remain up (as they're Ethernet) and GRE Tunnel remains up (as it's a virtual interface) but all the 172.20.x.x peers go away, as evidently they become unreachable.
Our ultimate goal is to receive 1 email alert when all the 172.20.x.x neighbors disappear from the eigrp routing neighbors table of a router, so to identify when a circuit outage happens -and this is where we found a roadblock. We’ve been trying countless approaches and alerting conditions, but none of the tests worked.
We want to be alerted when *all* the 172.20.x.x peers go down from a router's eigrp neighbor table, not only one -otherwise this would generate a great number of emails and many false positives: for example if 1 sites goes down, we do not want to receive 29 emails from the other routers saying that 1x peer went down, but just 1x email from that one router saying that it lost all the other peers.
We have been told by Solarwinds (ticket 597398) that the actual Routing Neighbors feature does not support this kind of scenario -which is highly disappointing, as we have been anxiously waiting for NPM 10.7 to support EIGRP routing neighbors, as we were told that this release would have fixed this issue (initial ticket #573121).
Concluding: has any of you experienced the same issue? Is there a solution for this specific alerting need in a scenario like this?
Many thanks in advance,
Dario
