[Bloat] Jumbo frames and LAN buffers

[Kevin Gross]

All the stand-alone switches I've looked at recently either do not support
802.3x or support it in the (desireable) manner described in the last
paragraph of the linked blog post. I don't believe Ethernet flow control is
a factor in current LANs. I'd be interested to know the specifics if anyone
sees it differently.

My understanding is that 802.1au, "lossless Ethernet", was designed
primarily to allow Fibre Channel to be carried over 10 GbE so that SAN and
LAN can share a common infrastructure in datacenters. I don't believe anyone
intends for it to be enabled for traffic classes carrying TCP.

Kevin Gross

-----Original Message-----
From: bloat-bounces at lists.bufferbloat.net
[mailto:bloat-bounces at lists.bufferbloat.net] On Behalf Of Jim Gettys
Sent: Monday, May 16, 2011 5:24 AM
To: bloat at lists.bufferbloat.net
Subject: Re: [Bloat] Jumbo frames and LAN buffers

Not necessarily out of knowledge or desire (since it isn't usually 
controllable in the small switches you buy for home).  It can cause 
trouble even in small environments as your house.

http://virtualthreads.blogspot.com/2006/02/beware-ethernet-flow-control.html

I know I'm at least three consumer switches deep, and it's not by choice.
                     - Jim