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Why does my connection keep getting lost?

Last response: in Networking
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August 21, 2012 4:43:33 PM

Hi,

For the past month or so my connection keeps getting lost whenever two computers in the house use the internet. We're connected to a 5 port switch and the switch is connected to the Modem. When both computers are online, mine keeps disconnecting, but the other one is fine. Whenever the other ethernet cable is unplugged, then mine is alright. We used to have 3 connections on at once and the same problem would repeat until the 3rd connection was cut off. But then the other two computers would be fine, other than a slight slowdown in speeds. I'm beginning to wonder if I should reinstall my computer. The computer I use is a Windows 7 Ultimate, the other one is Windows XP Professional (Sp2 I think). I tried changing the IPV4, but nothing seems to change anything. I figured that I'd do ipconfig and here is what it says.

Microsoft Windows [Version 6.1.7600]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.

C:\Users\*hidden*>ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : *hidden*
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) 82566DC-2 Gigabit Network Connec
tion
Physical Address. . . . . . . . . : 00-1D-09-12-23-87
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IPv4 Address. . . . . . . . . . . : 192.168.1.2(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Tuesday, August 21, 2012 6:37:07 PM
Lease Expires . . . . . . . . . . : Wednesday, August 22, 2012 6:57:40 PM
Default Gateway . . . . . . . . . : 192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.1
DNS Servers . . . . . . . . . . . : 192.168.1.1
NetBIOS over Tcpip. . . . . . . . : Enabled

The other computer has similar results except that the IP ends at 3 not 2.
I have tried changing the configuration, but the problem still persists.
What am I doing wrong? How do I stop my Internet from constantly disconnecting?

Speedtest.net shows: 145 ms

Down: 5.22mbps (up to 10mbps)
Up: 0.83mbps (up to 3mbps)

This is the average result when the other connection is off. When the other connection is on then Speedtest.net hardly even opens.
In fact the connection becomes as bad as Dial-Up, but probably even worse. Is ESET NOD32 the culprit here? I just can't find the solution.

More about : connection lost

August 22, 2012 5:22:02 PM

Probably an issue with the switch or one of the network cables, try a different switch and/or new cables. Sometimes a bad network port on the computer can cause this also.
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August 22, 2012 5:31:27 PM

Xile said:
We're connected to a 5 port switch and the switch is connected to the Modem.


Unless this is a combination modem/router, this will not work since your ISP only assigns one IP address. Your connection should be modem->router->switch.
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August 22, 2012 5:42:50 PM

Hawkeye22 said:
Unless this is a combination modem/router, this will not work since your ISP only assigns one IP address. Your connection should be modem->router->switch.


I missed that, not having a router would cause this issue.
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August 23, 2012 4:43:33 AM

Hawkeye22 said:
Unless this is a combination modem/router, this will not work since your ISP only assigns one IP address. Your connection should be modem->router->switch.

Sorry, I should have mentioned that it's a Modem/Router. We use a D-Link DSL-2500U model.
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August 23, 2012 4:48:08 AM

hang-the-9 said:
Probably an issue with the switch or one of the network cables, try a different switch and/or new cables. Sometimes a bad network port on the computer can cause this also.

The place where we live doesn't seem to have any 5-Port Switches. We use what we have. It worked fine up until a month ago. The area here is very bad for electricity. Whenever we have rain, thunderstorms follow. We've lost 3 modems so far, and a few other computer components. I should probably invest in a stabilizer or something similar, first. On top of that the telephone lines are poorly set. Even a strong wind can cut off the lines at times.
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Best solution

August 23, 2012 11:59:14 AM

It sounds like you need a UPS (battery backup) with surge protection. Bad power can easily destroy single ports on a router or switch, along with most any other electronic devices.
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August 24, 2012 4:01:00 PM

Best answer selected by Xile.
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September 6, 2012 10:06:27 AM

Bought an Asus GX1005 Power saving switch = Problem solved. Not only that but I went from 170 ms latency to 45 ms! Big improvement overall.
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