chromeos/test/data/network/policy/policy_ethernet_eap.onc

{
  "NetworkConfigurations":[
    {
      "Ethernet":{
        "Authentication":"8021X",
        "EAP":{
          "ClientCertPattern":{
            "IssuerCAPEMs":[
              "pem1"
            ]
          },
          "ClientCertType":"Pattern",
          "Outer":"EAP-TLS",
        }
      },
      "GUID":"guid",
      "Name":"name",
      "Type":"Ethernet"
    }
  ],
  "Type":"UnencryptedConfiguration"
}