In my case, its only memory that is spiking and it concurrent with spike in traffic. Interesting too that logging is stopped. I presume because of the same root issue.

I think you've describe the behaviors accurately including the eventual consequence of DHCP failing. Is there a firmware (beta or otherwise) to address the high CPU / memory leak issues?

High CPU utilization profile makes sense. At some point, the CPU could become so saturated, it wouldn't be able to maintain connectivity status correctly.

@StephenNorbury I'm getting the same thing with my ER605 V2. Thought it might be heat related and added cooling fan. Did not help. A power cycle seems to help for awhile. Did not have this problem...

@GoPokes1 slight correction: logs DID show overlap subnet error on initial auto IPSec attempt to add 2nd router. But after deleteing auto VPN there were no other logs pertaining to 'VPN' or 'IPSec'

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...