Just some points to note here before you get into any
fancy management software.
1. You should not trust autonegotiation of speed or
duplex. The autonegotiation protocols are very poorly
standardized. Be clear on what speed and duplex each
port/station can support and configure the switch
settings accordingly.
2. A speed mismatch will render the port inoperable. A
duplex mismatch won't (i.e. the light will remain
green) but performance will suffer badly due to the
duplex mismatch which makes it very dangerous.
3. When you connect to a switchport initally it will
remain orange for about 50 seconds in any case while
it waits for spanning tree to resolve itself. So don't
be fooled by this. You can put it into immediate
forwarding using the "portfast" feature. However don't
disable spanning tree on inter-switch links!
4. In terms of the value gained by a switch, it is
also important to understand your client-server
traffic flows. For example a switch would give limited
benefit if most traffic had to cross the WAN to a
remote server.
Regards,
Cormac Long, CCSI#21600
http://www.cormaclong.com
--- imran obaidullah <[EMAIL PROTECTED]> wrote:
> Hi,
>
> I have a network of around 20 macs connected to the
> hub and all accessing
> the internet through a single internet box which is
> ip based. I have
> replaced the hub with catalyst 3500 and when I
> connect the mac to the switch
> the led on the port is showing orange colour and
> then I made the all the
> port to full duplex, speed 100 then the switch
> started working.
>
> I think the nic in mac is not auto negotiating with
> switch port. But the
> users are complaining that the network is very slow
> and internet access
> speed also has come down.
>
> I really could not diagnoise the problem because the
> switch should give
> better performance than hub. Is there any
> troubleshooting procedues through
> which I can find out the problem. is there any
> software on the net which
> will show me the bottleneck. If any body has got
> information, please send it
> to me.
>
> regards
>
> imran
>
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