Re: : ISSUE: Extensibility of commands (Auth-Application- Id)

> When a new attribute is added that is mandatory, then you should apply
> for a command-code (and a application-id), because the ABNF isn't
> compatible anymore. 

Only use of a new application-id is required.  Use of a new command code 
is not required, and is probably a bad idea, because: 

> New command-codes in existing applications won't be recognized by
> remote servers, so you receive a DIAMETER_COMMAND_UNSUPPORTED.