RE: some numbering clarifications

["Douglas Otis" <dotis@sanlight.net>]

Julo,

>    iSCSI initiators MUST implement the command/request numbering scheme
>    only if they support more than one connection.

This statement seems to imply CmdRN is optional.  Would CmdRN remain at an
invalid zero?

>    iSCSI targets MAY use the command/request numbering scheme for ordered
>    delivery when they support multiple connections. However, they MUST
>    provide ExpCmdRN and MaxCmdRN values that will enable the initiator to
>    make progress.

As CmdRN is used both to order commands across multiple connections and
provide command flow control at the target, how does CmdRN become optional?
Forgive me if this is yet another dumb question.

Doug