OMG! Arent we missing the point here? What about never running links above 60% or so to allow for bursts against the 5 min average, and <shudder> upgrading or adding capacity when we get too little headroom. And here we are, nickel and diming over a few MBps near to 45M on a DS3... .... Or has the world changed so much that saturated pipes are The Way Things Are TM now. jm On Wednesday, February 20, 2002, at 09:37 AM, Alex Rubenstein wrote:
BTW:
30 second input rate 13039000 bits/sec, 8055 packets/sec 30 second output rate 45531000 bits/sec, 10021 packets/sec
Thats a pa-2t3+ on a flexwan in a 6509.
On Wed, 20 Feb 2002, Stephen J. Wilcox wrote:
Hmm, reasonable explanation..
presumably this can be improved (a little) with increased interface buffers.. ? and possibly non fifo queuing eg custom queuing in favour of TCP rathen than UDP/ICMP etc which wont have the backoffs
Cheers
Steve
On Wed, 20 Feb 2002, Randy Bush wrote:
we run HDLC on DS3 and we max at about 40.something too
if you're using five min (or three min) samples, and you're seeing 70%, peaks are likely much higher and some users' packets are being dropped. by 80%, enough packets are being dropped that users are likely to see the effects of exponential backoff. things do not improve above 80%.
randy
-- Stephen J. Wilcox IP Services Manager, Opal Telecom http://www.opaltelecom.co.uk/ Tel: 0161 222 2000 Fax: 0161 222 2008
-- Alex Rubenstein, AR97, K2AHR, alex@nac.net, latency, Al Reuben -- -- Net Access Corporation, 800-NET-ME-36, http://www.nac.net --