Subject: Re: 3/50 Ethernet speed
To: Scott J. Ellentuch <>
From: Jason Thorpe <>
List: port-sun3
Date: 05/30/1995 09:52:45
On Tue, 30 May 1995 12:04:36 -0400 (EDT) 
 "Scott J. Ellentuch" <> wrote:

 > 	Its megabits.  And as for the program, I can post a copy if everyone
 > doesn't mind.  Its only  :
 >     885 ttcp.c

Ok, so one of the machines is a Sun running 4.1.1...what's the other 
one?  Is that with tcp or udp?  After running ttcp, what does `netstat 
-i' tell you on each machine?  I mean, 2mbits for a sun3 isn't 
terrible...just for quick comparison (I haven't done a datailed 
analysis), an ftp between two 486-66 NetBSD-current machines with 
16-bit SMC ethernet cards, both on the same relatively low-collision   
subnet achieves roughly 4.5mbits/sec.

While ttcp is a useful program (we use it to test the speed of classical IP 
over ATM links a lot here...), it's output really isn't the only factor 
to consider when evaluating the overall performance of your network.

Jason R. Thorpe                             
NASA Ames Research Center                               Home: 408.866.1912
NAS: M/S 258-6                                          Work: 415.604.0935
Moffet Field, CA 94035                                 Pager: 415.428.6939