Re: Status summary on multiple connections

["Mark A. Carlson" <mark.carlson@sun.com>]

Y P Cheng wrote:
> 
> 
> Randall and Mark:
> 
> Both of you forget about the case when multiple PDUs are inflight, say N,
> N+1, and N+2, and one of them has CRC error, say N+1.  The receiver throws
> away N+1 because the bad CRC.  N+2 is received long before N+1 is
> retransmitted after a timeout by the sender.  Of course, a sequence number
> inside the PDU will ensure sequentially.  However, as I stated in another
> posting, all software realize such problem and will not count on sequential
> delivery by a transport.

N+2 is received by the TCP stack, but not delivered to iSCSI until N+1 arrives
(from the retransmit) and is delivered in sequence. This is how TCP works
according to my understanding.

-- mark