Cisco PPP DS-3 limitations - 42.9Mbpbs?

Stephen J. Wilcox steve at opaltelecom.co.uk
Wed Feb 20 16:08:47 UTC 2002


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




More information about the NANOG mailing list