I guessed this as soon as he mentioned spinning up/down a lot of machines using scripting. I've seen the same thing happen within an OpenStack environment I used to maintain.
As part of the cloud-init scripts on new machines we would install arping and have the newly provisioned VM automatically send gratuitous arps so that arp caches would get updated.
I haven't seen the issue on my RHEL 7 VM's though, nor in my current environment, but we don't spin up/down as many VM's as we used to.
As part of the cloud-init scripts on new machines we would install arping and have the newly provisioned VM automatically send gratuitous arps so that arp caches would get updated.
I haven't seen the issue on my RHEL 7 VM's though, nor in my current environment, but we don't spin up/down as many VM's as we used to.