yangdelintadd.json

{
 "Cisco-IOS-XR-ifmgr-cfg:interface-configurations": {
  "interface-configuration": [
   {
    "active": "act",
    "interface-name": "Loopback201",
    "Cisco-IOS-XR-ipv6-ma-cfg:ipv6-network": {
     "addresses": {
      "regular-addresses": {
       "regular-address": [
        {
         "address": "2001:db8:20::1"
        }
       ]
      }
     }
    }
   },
   {
    "active": "act",
    "interface-name": "Loopback301",
    "Cisco-IOS-XR-ipv6-ma-cfg:ipv6-network": {
     "addresses": {
      "regular-addresses": {
       "regular-address": [
        {
         "address": "2001:db8:30::1"
        }
       ]
      }
     }
    }
   }
  ]
 }
}