[133425] in North American Network Operators' Group
Re: TCP congestion control and large router buffers
daemon@ATHENA.MIT.EDU (Mikael Abrahamsson)
Thu Dec 9 10:20:14 2010
Date: Thu, 9 Dec 2010 16:20:10 +0100 (CET)
From: Mikael Abrahamsson <swmike@swm.pp.se>
To: Vasil Kolev <vasil@ludost.net>
In-Reply-To: <1291907382.19262.212.camel@shrike>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Thu, 9 Dec 2010, Vasil Kolev wrote:
> I wonder why this hasn't made the rounds here. From what I see, a change
> in this part (e.g. lower buffers in customer routers, or a change (yet
> another) to the congestion control algorithms) would do miracles for
> end-user perceived performance and should help in some way with the net
> neutrality dispute.
I'd say this is common knowledge and has been for a long time.
In the world of CPEs, lowest price and simplicity is what counts, so
nobody cares about buffer depth and AQM, that's why you get ADSL CPEs with
200+ ms of upstream FIFO buffer (no AQM) in most devices.
Personally I have MQC configured on my interface which has assured bw for
small packets and ssh packets, and I also run fair-queue to make tcp
sessions get a fair share. I don't know any non-cisco devices that does
this.
--
Mikael Abrahamsson email: swmike@swm.pp.se
