Re: TCP limitations (was Re: ISCSI: Urgent Flag requirement violates TCP.)

["Jim Williams" <jimw@giganet.com>]

----- Original Message -----
From: Matt Wakeley <matt_wakeley@agilent.com>
To: <ips@ece.cmu.edu>
Sent: Monday, November 27, 2000 3:35 PM
Subject: Re: TCP limitations (was Re: ISCSI: Urgent Flag requirement
violates TCP.)


> csapuntz@cisco.com wrote:
>
> > Given that shim protocol requires no changes to the TCP in the sender,
> > it is currently my favorite way of doing RDMA.
> >
> > -Costa
>
> Please see Jeff's message on 10/26.  If you don't have framing, when you
lose
> a segment, you need to buffer generic TCP segments on the NIC before you
can
> "RDMA" them somewhere, because you don't know where the "RDMA" information
is
> in the "byte stream".
>
> -Matt
>

http://www.ietf.org/internet-drafts/draft-williams-rdmatcp-00.txt

is an example of a shim layer that provides a mechanism
to recover framing upon loss of TCP segments.