[98679] in North American Network Operators' Group
Re: Extreme congestion (was Re: inter-domain link recovery)
daemon@ATHENA.MIT.EDU (Fred Baker)
Wed Aug 15 12:02:06 2007
In-Reply-To: <Pine.GSO.4.64.0708151128390.4450@clifden.donelan.com>
Cc: Stephen Wilcox <steve.wilcox@packetrade.com>, Chengchen Hu <huc@ieee.org>,
nanog <nanog@merit.edu>
From: Fred Baker <fred@cisco.com>
Date: Wed, 15 Aug 2007 08:47:42 -0700
To: Sean Donelan <sean@donelan.com>
Errors-To: owner-nanog@merit.edu
On Aug 15, 2007, at 8:35 AM, Sean Donelan wrote:
> Or should IP backbones have methods to predictably control which IP
> applications receive the remaining IP bandwidth? Similar to the
> telephone network special information tone -- All Circuits are
> Busy. Maybe we've found a new use for ICMP Source Quench.
Source Quench wouldn't be my favored solution here. What I might
suggest is taking TCP SYN and SCTP INIT (or new sessions if they are
encrypted or UDP) and put them into a lower priority/rate queue.
Delaying the start of new work would have a pretty strong effect on
the congestive collapse of the existing work, I should think.
