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Optimization Issue 23 (Sec 3.1): Predictive Loop Avoidance Details: A routing loop that occurs in a diameter node can already be detected and possibly avoided by its previous-hop Solution: The previous-hop can check to see if the next-hop for a message is already present in the messages’ Route-record AVP. If so, it can attempt to forward to an alternate route or send an DIAMETER_UNABLE_TO_DELIVER |