{
     "ietf-system:system": {
       "authentication": {
         "user-authentication-order": [tacacs-plus, local-users]
       }
       "tacacs-plus": {
         "server": [
           {
             "name": "tac_plus1",
             "server-type": "authentication",
             "address": "192.0.2.2",
             "shared-secret": "QaEfThUkO198010075460923+h3TbE8n",
             "source-ip": "192.0.2.12",
             "timeout": "10"
           }
         ]
       }
     }
   }