I have two mikrotik routers connected with wireshark over the internet.

My ip changed the ip address of the server router.

The client still continued to remain connected to the server router.

How is this possible?

When i looked at the admin panel, i saw peer endpoint showing old ip address. Current peer endpoint showing the new ip address.

How is this possible? How did the client learn the new ip address and was able to connect to it?

I couldnt do normal vpn to the old ip address from my phone. I had to change it to the new ip address