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Cisco switching issues

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by aforjeh 1 view

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We have a stack of 3 cisco 2900 xl switches, all connected to a cisco fibre backbone switch. I've recently noticed when connecting printers etc that ports on two switches don't light up as a device is connected, whereas one lights up instantly. I've checked (via visual switch manager (a java based web client thing) that all ports are set to autonegotiate speeds etc and that port fast is on, but this doesn't help... any ideas???

Also , some devices are experiencing severely slow network access (i.e. copying off a 150 mb file takes 45 minutes as opposed to the usual 45 seconds).. could be related to the other problem???

3 replies

by benyap

Hi,
I am using the same type of switch in my office as well. I used to face the same problem before but after some testing, this is what we found out.

The Problem:
1. The switches is by default running in
10/100Mbps.(Autonegotiate)
2.Most network printer is running under
10Mbps network card.
The problem is the switches doesn't really autonegotiate hence the network packets sent to the printer is faster than what it can receive and this caused the lost packets.

The Solution:
Identify the ports and force the particular port to 10Mbps.

As for the slow network access, try to identify your network card if it is 10/100Mbps card. Then if you are using TCP/IP protocol, try to remove other protocol like Netware, NetBEUI and IPX/NetBIOS.

Hope this will help.

Regards

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