RFC 3588:Diameter Base Protocol
RFC-Ref

Diameter command


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... if the "M" bit is set when the same AVP is used within other Diameter commands (i.e., authentication/authorization commands). ...


... Diameter Command Naming Conventions ...
... Diameter command names typically includes one or more English words followed by the verb Request or Answer. Each English word is delimited by a hyphen. A three-letter acronym ...


... The Command Code namespace is used to identify Diameter commands. The values 0-255 are reserved for RADIUS backward compatibility ...



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