RE: FCIP/iFCP : Guarantee In-Order delivery for FC N/NL_ports

[Gabriel Hecht <ghecht@gadzoox.com>]

Currently, FCIP doesn't map TCP channels to FC streams.  By stream, I mean,
related FCP commands and data that may require 'in order delivery' by the
SCSI application.  Mapping TCP channels to FC addresses will guarantee that
a FC-stream is fully contained within a TCP channel.  FCIP leaves this
mapping to the Gateway implementation.  For example, assigning a TCP
connection per remote D_ID address or group of address is relatively easy
for the H/W to implement.  If we don't want to use time-stamp for ordering,
the only implementation limit will be to not put a FC stream on more than
one TCP channel, to avoid out of order delivery.

Gaby


-----Original Message-----
From: Douglas Otis [mailto:dotis@sanlight.net]
Sent: Thursday, January 25, 2001 11:11 AM
To: Black_David@emc.com; ips@ece.cmu.edu
Subject: RE: FCIP/iFCP : Guarantee In-Order delivery for FC N/NL_ports


David,

For what it's worth, I am not making such fine distinctions.  I was
attempting to discuss a reason for including a time-stamp should such
placement be onto FC media.  (Looking to the day when there is a means to
handle out of sequence frames.)

Doug