Drivers for FORE systems cards under FreeBSD

Terry Lambert terry at cs.weber.edu
Fri May 26 16:11:27 PDT 1995


> > Much as I hate generalisations .. I would warn that ATM and IP apparently do
> > not mix well in cases where good interactive response is critical, at least
> > in my limited experience. I get better response over my own overworked 14k4
> > modem connection to the net than over a (university based) 2 megabit ATM
> > link.
> 
> This is not a general problem with ATM, and I tend to say that it's
> because there are other users on the 2Mb ATM than you.
> 
> It's certainly not an argument against ATM...

Poul's right.  It's an argument against bandwidth overcommit.

Which is an argument against non-virtual circuit transports for virtual
circuit traffic.

THAT's the argument against ATM.

On the other hand, ATM and Frame Relay source quench doesn't really
work well with TCP/IP, since TCP/IP doesn't recognize it as a valid
congestion control mechanism.  Arguably, the problem is in TCP/IP.

Except it came first.


					Terry Lambert
					terry at cs.weber.edu
---
Any opinions in this posting are my own and not those of my present
or previous employers.



More information about the freebsd-announce mailing list