[nycbug-talk] Noob networking question

Peter Wright pete at nomadlogic.org
Thu Jul 20 20:03:29 EDT 2006

> Hello all,
> I have a FreeBSD 6.0 atalk (networking for Macintosh) server in a small
> office, and I am getting radically different speeds, from different
> machines (all 100T ethernet connections) even at night when I know I am
> the only one doing anything on the network.
> The slowness seems more obvious using appletalk, because to copy a 500MB
> file from one machine to the shared disk took a minute, to copy it from
> the server, behind the switch the copy was asking for several hours.
> And copying it from the server to another machine took 24mins.
> Question 1) are there any tools I can use to tune the speed of different
> services (like appletalk) through the network ?

netperf is a usefull tool to measure throughput of network devices:
this will not help with atalk though...

on *BSD systat may be helpfull to monitor host specific load
(-vmstat/-ifstat can be helpfull in some situations)

I've used ntop in the past when tying to monitor NFS and atalk usage on


I'm sure there are all sorts of other tool's I'm forgetting...

> Question 2) I have a few machines off a switch (linksys 100 baseT) which
> is connected through the uplink port and a crossover to the main
> router/firewall/gateway netgear.  Machines connected to this switch
> (which is new) seem much much slower than the rest.  Is there anything
> I can do about this ?

have you checked link state (AutoNeg is bad) and that you are full duplex.
 i dunno, i usually find the basic stuff is a good starting point (check
physical links first etc..).


Peter Wright
pete at nomadlogic.org

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