Re: Jumbo Frames in 10GbE?
- To: Bruce_Tolley@xxxxxxxx
- Subject: Re: Jumbo Frames in 10GbE?
- From: "W. R. Wing" <wrw@xxxxxxxx>
- Date: Mon, 21 Jun 1999 22:21:23 -0400
- Cc: Larry Miller <l_d_miller@xxxxxxxxxxxxx>, "Booth, Brad" <bbooth@xxxxxxxxxx>, Joe Gwinn <gwinn@xxxxxxxxxx>, "HSSG_reflector (E-mail)" <stds-802-3-hssg@xxxxxxxx>
- In-reply-to: <88256797.00700F37.00@xxxxxxxxxxxxxxxxxxxxxxx>
- References: <88256797.00700F37.00@xxxxxxxxxxxxxxxxxxxxxxx>
- Sender: owner-stds-802-3-hssg@xxxxxxxxxxxxxxxxxx
At 1:24 PM -0700 6/21/99, Bruce_Tolley@xxxxxxxx wrote:
>Let us not be too hasty about concluding that the market "obviously"
>is going to
>Only one switch vendor has actively promoted jumbo frames to date. An
>examination of market share numbers from such firms as Dell'Oro
>Group shows that
>there is no evidence that the end user market is going to jumbo frames.
As a long time lurker on this list, I finally feel compelled to speak
out. I'm a USER of the equipment. I see the advantages of jumbo frames
from view point of the end equipment, but I see the disadvantages (both
from the inter-operability point of view and burstiness point of view)
of jumbos out in the network. It seems to me the real answer is to fix
the problem of the end equipment *at* the end equipment. Surely it
would be possible these days to build a smart NIC, possibly one that was
IP aware. Give it LOTS of on-board hardware buffering, and let the
OS hand it a buffer full. It would perform the Ethernet equivalent
of an ATM SAR operation, slice the buffer up into standard Ethernet
frames, put headers on them, and ship them out. The network would
get all the benefits of standard frames, the end equipment would get
the benefits of big buffers and low interrupt rates.
Let me repeat. As a user, I value backwards compatibility. I see
no point in asking the network to solve an end equipment problem.
Thanks for letting me vent,
William R. Wing wrw@xxxxxxxx (423) 574-8839
Network Architect for the Oak Ridge National Lab