nanog mailing list archives
Re: TCP congestion control and large router buffers
From: Joel Jaeggli <joelja () bogus com>
Date: Sun, 19 Dec 2010 11:16:12 -0800
On 12/9/10 7:20 AM, Mikael Abrahamsson wrote:
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.
you're going to see more of it, at a minimum cpe are going to have to be able to drain a gig-e into a port that may be only 100Mb/s. The QOS options available in a ~$100 cpe router are adequate for the basic purpose. d-link dir-825 or 665 are examples of such 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.
the consumer cpe that care seem to be mostly oriented along keeping gaming and voip from being interfereed with by p2p and file transfers.
Current thread:
- TCP congestion control and large router buffers Vasil Kolev (Dec 09)
- Re: TCP congestion control and large router buffers Mikael Abrahamsson (Dec 09)
- Message not available
- Re: TCP congestion control and large router buffers Mikael Abrahamsson (Dec 13)
- Message not available
- Re: TCP congestion control and large router buffers Mikael Abrahamsson (Dec 14)
- RE: TCP congestion control and large router buffers George Bonser (Dec 14)
- RE: TCP congestion control and large router buffers Mikael Abrahamsson (Dec 14)
- Message not available
- Re: TCP congestion control and large router buffers Mikael Abrahamsson (Dec 09)
- Re: TCP congestion control and large router buffers Jim Gettys (Dec 20)
- Re: TCP congestion control and large router buffers Mikael Abrahamsson (Dec 20)
- Re: TCP congestion control and large router buffers Sam Stickland (Dec 21)
- Re: TCP congestion control and large router buffers Fred Baker (Dec 21)
- Re: TCP congestion control and large router buffers Jim Gettys (Dec 22)
- Re: TCP congestion control and large router buffers Fred Baker (Dec 22)
- RE: TCP congestion control and large router buffers George Bonser (Dec 22)
- Re: TCP congestion control and large router buffers Carsten Bormann (Dec 23)
- <Possible follow-ups>
- TCP congestion control and large router buffers Jim Gettys (Dec 14)