The IP over ATM Mailing List Archive by date

[Mike Moreton <mike@madge.co.uk>]

> 2/ TCP on IP on AAL5 on an ABR service
> 
> we'd like an explicit congestion bit (even if ATT don';t let us get
> the explicit rate,they'll still pass the congestion signal back sooner
> than packet loss in traditional TCP congestion detection) signal from
> AAL up thu IP....

I'm interested why you 'd want this.  Without it, down at the SAR level
transmission of your traffic will get slowed down because of the congestion
indication coming back, and may get queued for a while.  TCP will run
out of window, and hence stop.

If you let TCP handle the congestion indication rather the hardware, wouldn't
you just be moving the queue of slowed down data somewhere else?

Mike.