In certain embodiments, a computer-implemented method includes detecting, by a first processing system, that a failure event operable to cause the first processing system to become inoperable has occurred. The method further includes communicating, by the first processing system using multicasting, a notification to two or more proxy processing systems. At least one of the proxy processing systems is operable to receive the notification and communicate the notification to a second processing system on behalf of the first processing system using a reliable communications protocol.