Network Connection Problem

[agoodrich]

I'm running a Unix SCO server on a pentium machine.

Starting today while downloading a bunch of files via ftp my connection stopped responding.
When I unplug the nic the light on the hub goes out but the light on the server stays light. I plug it back in and the switch light stays off.

The only way I can get the light on the switch to come back on is to restart the server. Soon as I see TCP/IP shut down the hub light pops back on. When the system restarts the connection works fine.

I have recreated this problem 4 times by using ftp and downlaoding files to my windows machine. I'm just pulling one file at a time useing the get <file>.ext method.

Anyone know why this could happen?

 

[PHV]

When your tcp/ip stack is down, execute the following command:
netstat -m
If you have any value other than 0 in the fail column you have to increase the STREAMS kernel parameter.

Hope This Helps, PH.
Want to get great answers to your Tek-Tips questions? Have a look at FAQ219-2884 or FAQ222-2244

 

[agoodrich]

Thanks for the info .. I will have to see if I get any fails.

 

[agoodrich]

Well I had this problem happen again. I checked netstat -m and found no fails. I noticed that he connection light on the card stays on. The light on the hub goes out and won't come back on.

The tcp stop and tcp start did not help.

Any Ideas?

 

[agoodrich]

Another note ... before I get the "its ok to power off" screen when rebooting somthing resets the network card and the light goes out on the card and then back on .. on the card and the hub.

Is there a way to reset or start stop the actual card?

 

[agoodrich]

More info.. I can recreate this problem by doing the following.

Make an ftp script
===========================
Open serveripaddress
User username passcode
bin
cd /u/data/
lcd e:\temp\files\

get file1.dbf
get file2.dbf
get file3.dbf
etc... about 60 or more files.
===========================
Then run ftp with this script.

The connection will just halt after 20 or whatever downloads happen.

What can I do then to find out problem exists or reset the network with out rebooting the machine?

Thanks for any help

 

[PHV]

The light on the hub goes out
A hub or a switch ?
If really a hub, you may consider force the Duplex Speed of your NIC to the fixed rate:
netconfig

Hope This Helps, PH.
Want to get great answers to your Tek-Tips questions? Have a look at FAQ219-2884 or FAQ222-2244

 

[agoodrich]

Its a switch .. linksys 10/100/1000 Mbps. The ethernet card is a Intel Pro/100+. The Duplex speed says Auto_Auto. Could I change that to 100 only? How What would I change Auto_Auto to somthing else?

Thanks

 

[PHV]

When the cursor is on Auto_Auto press the down arrow key to get the drop down list of possible values.

Hope This Helps, PH.
Want to get great answers to your Tek-Tips questions? Have a look at FAQ219-2884 or FAQ222-2244