jdk/test/sun/security/krb5/krb5.conf

[realms]
   EXAMPLE_0.COM = {
      kdc = kdc.example.com
      kdc = kdc2.example.com
   }

   EXAMPLE_1.COM =
   {
      kdc = kdc.example.com
      kdc = kdc2.example.com
   }

   EXAMPLE_2.COM = {
	kdc = kdc.example.com
	kdc = kdc2.example.com
	inner = {
		aaa = nnn
	}
   }

   EXAMPLE_3.COM = {
	kdc = kdc.example.com
	kdc = kdc2.example.com
	inner =
	{
		aaa = nnn
	}
   }