How to redirect a sip client to another server for registration?

Question

Asterisk

There are two servers with asterisks. It is necessary to migrate clients from server A to server B, while server A is registered on the clients with an ip address. How can I direct clients for authorization to server B? That is, the IP address will remain in the client settings, and the registration will actually take place on server B. And is this possible?
So far, I have an idea on server A to add a notification about changing settings before the call. Maybe this is more correct

Answer 1

kamailio
but it's easier to switch to a domain name

Answer 2

you need to use a domain name, you just had to change the ip to A.
but since you wrote the ip, it’s better to change the ip on the clients, because then it will be more difficult to troubleshoot, and I don’t think that what you want will work, since the client is hard registered SP