Re: ftpd file transfer speed troubleshooting

["Steven M. Bellovin" <smb%cs.columbia.edu@localhost>]

On Wed, 20 Aug 2008 20:38:39 +0100
Matthias Scheler <tron%zhadum.org.uk@localhost> wrote:

> 
> On 20 Aug 2008, at 18:40, Camilo Reyes wrote:
> 
> >> From: Robert Swindells <rjs%fdy2.demon.co.uk@localhost>
> >> Sent: Wednesday, August 20, 2008 11:10:27 AM
> >>
> >> Make sure that you don't have one end of the transfer at
> >> full-duplex and the other at half-duplex.
> >>
> >
> > How do I check that?
> 
> 
> If both machines are running NetBSD "ifconfig" on the ethernet
> interface will tell you:
> 
> tron@colwyn:~>ifconfig wm0
> wm0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
> [...]
>          media: Ethernet autoselect (1000baseT full- 
> duplex,flowcontrol,master,rxpause,txpause)
>          status: active
> [...]
> 
> In this case the interface is running at 1Gb/s in full-duplex mode.
> 
Also, run pkgsrc/bench/ttcp, to see if the network is the bottleneck or
something else.


                --Steve Bellovin, http://www.cs.columbia.edu/~smb