Chee Tong,
Looks like the problem you're having is on the network card of each
computer.  Make sure you use all 100mbps full-duplex NICs.  You can find
out the speed and duplex mode of each NIC by doing this on your cat29xx
switch: 

sh int fastethernet0/1

Hope it'll help you.

********************************************
Luan T. Kim, MCSE, CCNA                    *
Systems/Network Infrastructure Engineer    *
MP3.COM, INC.  http://www.mp3.com          *
Phone: 858-623-7341    Cell:  858-382-3055 *                     
Fax:   858-623-7400    Email: [EMAIL PROTECTED] *                            
********************************************


On Mon, 3 Jul 2000, Chee Tong Sim wrote:

> Dear friends,
> 
> I have a few questions to ask:
> 
> 1) Our company Network are running at 100M speed. Now if I connect a 10M 
> speed 3com hub to one of the ports in cisco 2900 switches (100M speed) in 
> the company network, and I connect 5 pc to the 3com hub, so, the network 
> speed of PC is 10M divided by 5= 2M each or 10M each?
> 
> 2) As the users complain about the speed, my boss asked me to use the brand 
> new 2900 switch (100M speed) to replace the 3com hub. So I connect 2900 
> switch to 2900 switch that in company network, and connect 5 Pcs to the 2900 
> switch, so the speed of PC should be 100M each or 100M devided by 5= 20M?
> 
> 3) But user still complain about the speed, I use the ftp function to check 
> the speed and found the speed is only 150kb/sec= 0.15M only. I suspect 
> because the switches that I used is a brand new switch, I havent configure 
> VLAN and spanning tree protocol on the new switch to block to packet 
> broadcase, so the speed is slow. If this is the case, can I consult you, how 
> to configure VLAN and spanning tree on the new switches? Can anyone teach 
> me? I ever seen the configuration file of a VLAN switches, but I don't know 
> what command should I type to configure VLAN on 2900 switch. What is the 
> procedures? Please help.
> 
> Thanks in advance.
> 
> Regards,
> Chee Tong
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