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Network , some computers slow and some computers fast on same switch

Posted on 2013-06-04
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Last Modified: 2013-06-13
To make this basic as possible.

I have two XP computers on one switch.
They are on .100 subnet

When I ping a machine on the .110 subnet one pc gets <1ms and the other pc gets 50 ms.


I have concluded it has something to do with the pc because I swapped ports and get the same results multiple times.

I need suggestions on how to test why one machine is fast and the other machine is slow.

They have the same gateway so they are using the same routes. (which works for one.)

Thanks Larry
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Question by:laraldo1
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Expert Comment

by:Rsilva98
ID: 39220001
it is a giga switch ? maybe you have different nics one at 100mbps and the other with 1000. Please be more specific, not all nics are the same and that affects the speed on the network
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LVL 30

Expert Comment

by:flubbster
ID: 39220013
Just as a check, make sure that there isn't an entry in the network properties for TCP/IPV6 support. If there is, make sure it is not checked.

Control panel>network connections
right-click network connection and select properties
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Expert Comment

by:activematx
ID: 39220040
50ms is really slow for pinging locally.  Even at 100mbps you should get around 1ms.   There is definitely something up with that second PC.

I would first check your TCP/IP settings.  As flubbster suggested make sure you uncheck IPV6 support, as that can sometimes slow it down.

Try resetting your TCP settings on the second PC.


Manual Method Directions
If this doesn't resolve it, I would try booting into safe mode with networking enabled (press f8 when starting the computer).  Then try pinging and see your results.

If the results are good, in safe mode, then you have some sort of software starting up at startup that is conflicting with your network speeds (possible software firewall).

If it is still slow in safe mode, then I would look at your NIC as possible being defective.
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laraldo1 earned 0 total points
ID: 39220309
I am going to reset my main switch tomorrow morning. The gateway switch. Then I will get back to everyone. it is a gig switch.
Larry
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Author Closing Comment

by:laraldo1
ID: 39243882
It was the router, once it was reset things worked properly.
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