The IETF RFC 3588 specifying the Diameter base protocol has been obsoleted by the IETF RFC 6733. This new version of the IETF RFC is not a new version of the Diameter base protocol but a specification update intended to fix issues discovered after early implementations of the protocol. The aim of the Technical Report is to:

• appraise the differences between the IETF RFC 6733 and the IETF RFC 3588;
• analyze the possible impacts on the 3GPP specifications relying on the Diameter base protocol and then;
• provide guidelines regarding a general update of the normative reference for Diameter base protocol.