Is 230 feet of Wire w/17 clients to far?
Posted on 2004-08-21
I have a run of cable that is about 230 feet long that runs from Cisco 2950 #1 to Cisco 2950 #2 and at Cisco #2 I have 17 client machines. But the data rate to those 17 machines is noticably slow using a particular database driven vb6 application.
I can transfer a 60mb file to the servers main drive in about 30 seconds. But a request from a client for data from a flat file database, which only raises the servers CPU load to 1% and network load to 0.25% and totals about 1/4 mb, takes sometimes over 2 minutes. Client machines connected to Cisco #1, which is the switch the server is plugged into, takes only 1 second for the same data.
Everyone who is plugged into Cisco #1 (which is where the server is plugged into) can grab data off the server fast.
Everyone who is plugged into Cisco #2 (which is about 230 feet away) has a VERY noticable slower ability to get the same application data from the server.
This just baffles me and I have run out of ideas and heres why.....
1. If I run a NEW 230 foot cable , across the floor from Cisco #1 to Cisco #2 the data rate doesn't change.
2. If I install a NEW non programable 24 port SMC switch running at 100mbs, in place of Cisco#2, to either the new or old cable the data rate doesn't change.
3. If I turn off all but 5 computers that are connected to Cisco #2, and make only one request from the server, the data rate doesn't change.
5. If I run a 230 foot cable from Cisco #1 directly to a client machine which was slow ...the data transfer is FAST.
In all instances I am connecting to a 100mb port (at least that is what my laptop tells me when I jack into it)
Yet ONE machine connected to Cisco #2 WAS fast even when I switched its ports on the switch! :/ ...But when I hooked it up to the plain SMC switch it slowed back down like all the others :/
I have run etherpeek on the server and have recorded a small amount of network errors between client and server durng the data transfer but it wasn't a significant amount.
It seems to me that 17 machines, 9 of which are used all the time, should be fine on one 200 foot wire running at 100 full duplex but maybe I'm wrong....am I?
Thanks for any Ideas or suggestions as to what I can do to solve this problem.