I use an ASAv in my home lab as the internet facing firewall. I am not having any problems with that, but I ran into a situation yesterday that brought 99% of my traffic to a halt. Here is what my outside interface looks like.
interface GigabitEthernet0/1
description Outside - ISP facing
nameif outside
security-level 0
ip address dhcp setroute
An ISP tech was out replacing my cable modem, so I needed the ASA to renew the IP address. Rather than reboot, I did a "no ip address" followed by "ip address dhcp setroute". This is how I have done that multiple times when I had a physical firewall. This appears to have caused my ASA to de-register with smart licensing. All was good once I generated a now token and registered it with the "force" keyword. My question is Why? What in that process made the ASAv decide its license registration/authorization was no longer valid? It is just about useless with the evaluation mode limit of connections.
