> As far as gig goes, Ethernet is a collision scheme. You can expect about

> 35% of rated performance assuming collisions are kept to a

> minimum by using

> switches. Gig is 10 times faster than Fast Ethernet, 100X faster than

> regular Ethernet.

>

That's why I still use 100vg instead of 100BaseTx. No collisions, ever.

Even with a fully loaded network with the maximum of 1,024 devices connected

at up to 5 layers deep, one is assured of a net throughput of 98mps! Too

bad it lost the marketing wars (like BetaMax vs VHS). I use an HP j3100b

Switch 2000 to bridge between 100vg, 100BaseTx and 10BaseT, and the j3100b

has a 1Ghz backplane to prevent any degradation in signal processing. Cool

technology. I NEVER have any speed issues on my LAN, ever.

Gil

Gilbert M. Hale

New Freedom Data Resources

Pittsford, NY

585-359-8085

gil@gilhale.com

> -----Original Message-----

> From: profoxtech-bounces@leafe.com

> [mailto:profoxtech-bounces@leafe.com]On Behalf Of Andrew Weiss

> Sent: Saturday, March 05, 2005 1:20 PM

> To: profoxtech@leafe.com

> Subject: RE: [NF] Slow Network Speeds

>

>

> Did you say 512mb ram running SBS 2003 server? That's barely enough.

>

> The speed from server to workstation at 4X less than the reverse is very

> suspicious. I would question your network/cards/wiring which you really

> didn't give details of.

>

> As far as gig goes, ethernet is a collision scheme. You can expect about

> 35% of rated performance assuming collisions are kept to a

> minimum by using

> switches. Gig is 10 times faster than Fast Ethernet, 100X faster than

> regular ethernet.

>

> If the network is not concentrated in a switch, change it out immediately.

> In ethernet, one bad NIC on a hub can cause all the symptoms you're

> describing.

>

> Best practice: This is way too many workstations for such an old server.

> They should have at least 2 gigs memory in the server of a newer machine.

> Upgrade the networking if it's not gig and get a switch which is all gig

> (autoswitching for the legacy machines). Make sure you put at

> least one gig

> NIC in the server no matter what you do after upgrading the hub/switch.

>

> BTW, find out if the wiring was field installed by somebody who had a

> scanner to certify it or if it was done ad hoc by a shlep. If the wiring

> isn't factory terminated or certified in place you could have a problem

> there.

>

> Andy

>

>

>

> -----Original Message-----

> From: profox-bounces@leafe.com [mailto:profox-bounces@leafe.com]On

> Behalf Of Michael Madigan

> Sent: Saturday, March 05, 2005 11:43 AM

> To: ProFox Email List

> Subject: Re: [NF] Slow Network Speeds

>

>

> What OS are the workstations running?

>

>

> --- Chester Friesen <glentech@sunset.net> wrote:

> > I am searching for ideas to diagnose slow network speeds. The server is

> > an Intel CA810E mobo, P3-1000Mhz, 512MB Ram (maximum for mobo). I

> > replaced the old HDD's with new Seagate 37GB SCSI with Adaptec 29320A

> > controller. At the same time I replaced NT 4 with Windows SBS 2003. This

> > is in a dentist office with 10 workstations. I used timethis.exe to test

> > file transfers, between 2 workstations it was fairly fast, but from the

> > server to a workstation it takes about 4 times longer. They are using

> > SoftDent software, plus others related to the dental industry. I have

> > uninstalled antivirus, set permissions, etc. to no avail. Also disabled

> > LMHosts lookup for the NIC. Disabling NetBIOS over TCP/IP kills the

> > connection, that may be what I need to chase down why.

> > OK, does anyone have any experience similar to this, will gigabit NICs,

> > router, help me? Or anything else to try?

> >

> > --

> >

> > Regards,

> > Chester Friesen

> >

> >

> >

[excessive quoting removed by server]