No, David, I think your understanding is fine. I agree with you that
with TCP/IP4 larger messages could still be sent and they'd just get
broken up. My point was that Microsoft might not think it's worth
sending larger messages, i.e., programming RDR and SRV to use the
CAP_LARGE SMB commands, unless there was an IPv6 stack in place that
WON'T break up the messages. Regarding the 1500-byte Ethernet limit
that you point out, there are media layers that don't break datagrams
into 1500-byte frames.

Thanks for the discussion. Hopefully somebody else will join in.

Steve Adams

On Fri, 9 Feb 2001 14:45:12 -0800, you wrote:

>--- Steve Adams <stvaEARTHLINK.NET> wrote:
>> Could it be that SRV and RDR are
>> waiting to sense an
>> IPv6 stack with jumbo payloads?
>
>OK, I think I'm getting outside of my territory now,
>because I don't know anything about IPv6. But I'm not
>sure if IPv6 should have anything to do with it.
>
>With SMB over TCP/IPv4, you should still be able
>to send a message > 64K, because the stream will be
>split into multiple IP datagrams and joined up by
>the recipient's TCP stack.
>
>Even if IPv6 supports single datagrams of size > 64K,
>then that still doesn't mean much because the datagram
>itself will have to be fragmented to travel over
>Ethernet, which has a max length of a little less than
>1500.
>
>Anyway, I'm sure I'm misunderstanding the question, so
>would someone else care to answer it?
>
>david
>
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