Here are some thoughts in no particular order:
Try plugging in a Sniffer and look for late collisions or other symptoms.
Oops, I forgot you have no money. For those of us who don't have $40,000
U.S. to spend on a Sniffer, there are shareware versions out on the Internet
that could help.
Check and make sure that you do not have a duplex mismatch. Duplex should
always be set manually on all devices. I never trust autonegotation because
the Nic makers and the hub makers didn't cooperate, and therefore duplex
negotiation can be random. Have you had a power outage in the last week?
Things can run along fine until a power outage or reboot, and then duplex
gets renegotiated, and then it's wrong. Such a problem can make a network
miserable.
>From a command prompt type netstat -s might help you a little.
Try unplugging devices one at a time, and see which one causes the collision
light blink less frequently. Check for a bad NIC. Try changing NICs.
Remember the arp cache on a Cisco router is 4 hours. Flush your cache.
It may just turn out that you have a ton of traffic. You have to remember
that ever since the Pentium, a single computer is able to flood a 10Mb wire.
You say that it happened this week. Check and see if someone has installed
new software recently. Check directory creation dates. Has someone installed
a new computer recently?
I hope that helps.
""John Brandis"" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> G'day all where ever you may be.
>
> I have been watching my network here in my office and I have noticed that
> over
> the last week, that the network is slowing down. Due to financial
> constraints,
> we are using 10/100 16 port hubs (2) {just thought I would point that out}
I
> have noticed that the collision LED's are on a fair bit these days. I
checked
> to see if the errors where due to cable problems or broken ports on the
hub,
> but this was not the case. I made sure all the PC's were using the same
> protocol and still I have an abnormal amount of collisions. I understand
that
> I will have collisons but for a 11 user network that is centerd around a
> WIN2k
> Server/Exchange server I have about a 40% collision rate.
> Does any one have any idea's (besides the obvious of buying a switch) on
how
> I
> can troubleshoot this or fix the problem.......
>
> Thanks gang
>
> John Brandis
> Network Engineer
> GoWireless Communications
> 155 George Street Sydney
> +61 2 9251 5000
> FAQ, list archives, and subscription info:
http://www.groupstudy.com/list/cisco.html
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