How to Troubleshoot Site-to-Site IPSec VPN w/ ER605s
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Goal: setup 4 branch offices to home office with site-to-site VPN.
Initially, I was able to get Auto IPSec VPN setup between home office and 1st branch router. Then tried to setup 2nd branch router and got an error claiming overlapping subnets although each branch router's local subnet is unique. Read here on the form to setup manual IPSec VPNs to overcome "overlap" subnet error. Followed step-by-step instructions for manual site-to-site IPSec w/ IKEv2 but no VPN tunnels were formed (checking Settings > Insight > VPN Status shows "No VPN seesions found."
Deleted and tried IKEv1 steps and still no VPN. Rebooted controller and all routers, then tried Auto VPN again and still no VPN. No messages in logs either.
How are we supposed to troubleshoot these cases if nothing is reported in the logs?
