AMF selection for isolated network slice

A method comprising:

• receiving, by a radio access network from a wireless device, a first registration request;
• sending, by the radio access network to a network repository function and in response to receiving the first registration request, a first message comprising:
• at least one single network slice selection assistance information (S-NSSAI) of at least one network slice;
• and
• network slice isolation information for the at least one S-NSSAI, wherein the network slice isolation information indicates that one or more first network functions of the at least one S-NSSAI are requested to be isolated from one or more second network functions of one or more other network slices;
• receiving, by the radio access network from the network repository function, a second message based on the first message, wherein the second message comprises an Internet protocol address of an access and mobility management function;
• and
• sending, by the radio access network to the access and mobility management function, a second registration request for the first registration request.