Radius Primary an Decondary

[Vinicius Bufoni]

   Hi People.

  My name is Vinicius,  and i have a freeradius in my company. But i have a question:

  Some way of mine radius work with primary and secondary proxy radius?? That is, if the first radius died  the second radius in the proxy get up???

  Excuse  for the bad English
  I hope you will understand my mail

  Thank you very much for all

  Vinicius Bufoni