It honestly sounds as if your first floor switch is having difficulty moving data
between its ports and the server.
When you're deploying switches in what has traditionally been a shared environment,
you must be careful to ensure that you haven't oversubscribed your uplinks (whether
they be uplinks to servers, or between switches). Plugging 24 100 Mbps (half-duplex)
connections into a switch with a 100 Mbps (half-duplex) uplink spells disaster. The
100 Mbps uplink contends with a theoretical (24 x 100 Mbps) 2,400 Mbps capacity.
Using the same analogy, but lowering the client data rate to 10 Mbps results in a
theoretical 240 Mbps throughput for the 100 Mbps uplink to contend with. And when
full-duplex is used on the client side, the magnitude of the oversubscription
increases again.
Properly deploying switches in a shared network environment requires that you
understand how your network functions--what capacity is required, where Fast
EtherChannel should be deployed, when 100 Mbps throughput should be used and when
should 10 Mbps be sufficient... and finally, when should you use full-duplex, and when
should you use half?
Capacity planning is the **most** important aspect of a successful switch-fabric
deployment. Undersubscription of links is always preferable to oversubscription.
-- Leigh Anne
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
> imran obaidullah
> Sent: Thursday, June 01, 2000 10:58 AM
> To: [EMAIL PROTECTED]; [EMAIL PROTECTED]; [EMAIL PROTECTED]
> Subject: RE: Network Troubleshooting
>
>
> Hi,
>
> Thanks for your information.
>
> The server and the clients in the 1st floor are on the switcha
> and there is
> a uplink which connects the 2nd floor. But to the surprise the
> people in 2nd
> floor are not complaining onlt the clients in the 1st floor started
> complaining as soon as I changed them from hub to switch .I tried
> enabling
> port fast for all the ports except uplink and still they have
> same problem.
> Sometimes they can see their neighbour and after few secs you can't see
> anyone through NN. Know all ports led is howing green colour but
> when I try
> it to keep to the auto it completely disable or permanently it
> shows orange.
> The NICs are set to auto mode for both the duplex and speed modes.
>
> regards
>
> imran
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