To manually change the network media selection, perform the following procedure.
For example, change active_media from SFP28 to RJ45. Then reset or power cycle the system to change current_active_media to RJ45.
-> cd /HOST/network
/HOST/network
-> ls
  /HOST/network
     Targets:
     Properties:
         active_media = SFP28
         auto_media_detection = disabled
         current_active_media = SFP28
      Commands:
         cd
         set
         show
-> show current_active_media
  /HOST/network
     Properties:
         current_active_media = SFP28
-> set active_media=RJ45
Set 'active_media' to 'RJ45'