Internet on pc keeps dropping connection while WiFi works perfectly fine

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Daniel Ilic

Reputable
Dec 29, 2014
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Just like i said my internet connection on pc(over ethernet cable) keeps dropping constantly. It keeps popping up the notif that the cable is unplugged. This started happening 2 days when tech support came over to change the router because the thing was dying out. I tried everything from rolling back the drivers to instaling the newest ones, changing ethernet cable didnt work either. It usually drops connection every 10mins for like a minute or two. Some times it even happens that the connection keeps dropping every few seconds.
 
Solution
Ralston18
Okay - that helped.

Start (change) your DHCP IP address range to start with 192.168.0.2

Reduce the number of DHCP Users from 119 to 8.

Your last image shows two devices being assigned static IP within the 119 address range. Specifically 192.168.0.11 and 192.168.0.12.

What I think may be happening is that your PC joins the network and gets assigned DHCP IP 192.168.0.11 or 192.168.0.12

Then one of the devices (wireless or otherwise) that has been assigned one of those static IPs comes online and you have an IP address conflict.

Find out using the MAC what two devices are using the static IP addresses of 192.168.0.11 and 192.168.0.12. Unless they are printers, NAS, scanners, a camera, etc. change them to use DHCP IP addressing...
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Is the connection between the PC and the router just a single direct Ethernet cable?

Or is there some interim component; e.g., an Ethernet wall jack, an Ethernet connector making two short cables into a longer cable?

Be sure the male Ethernet plugs on both ends are firmly in place and squarely connected to the wire.

Try a third known working Ethernet cable. Ensure that each end is firmly and snuggly connected to its' respective receiving port.

PCI_x network adapter? Open your pc up and ensure that the network adapter is fully seated in place. Do the same if you are using some form of USB to Ethernet adapter. Overall, make sure that whatever network adapter is being used is tightly in place.

Look for debris inside the Ethernet ports on both ends. Anything at all (could be some piece of paper, a dust bunny, a dead bug) that may be interfering with connectivity.

Try another router LAN port if possible. Temporarily disconnect a working computer and plug in your computer.

Check the router's logs (if available and enabled) for errors.

Check your computer's Event Viewer logs as well.

The goal is to narrow down the problem source: e.g., router, cable, wall jack, network adapter,etc...




 
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Yes its a single cable thats between those two. Tried another cable and it didnt work. Searched for the router logs and they are nowhere to be found. I made sure that there is no debris in both ports. I dont use PCi x adapter.
 
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Host Name . . . . . . . . . . . . : DESKTOP-JF55GSH
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Ethernet:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek PCIe GBE Family Controller
Physical Address. . . . . . . . . : 90-2B-34-72-70-BD
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::21e1:57b3:64d:e364%10(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.0.17(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Friday, August 25, 2017 01:32:49 AM
Lease Expires . . . . . . . . . . : Saturday, August 26, 2017 01:35:29 AM
Default Gateway . . . . . . . . . : 192.168.0.1
DHCP Server . . . . . . . . . . . : 192.168.0.1
DHCPv6 IAID . . . . . . . . . . . : 177220404
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-20-E6-98-CD-90-2B-34-72-70-BD
DNS Servers . . . . . . . . . . . : 89.216.1.40
89.216.1.50
NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter Teredo Tunneling Pseudo-Interface:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : 2001:0:9d38:953c:4d:3297:4d6a:ea22(Preferred)
Link-local IPv6 Address . . . . . : fe80::4d:3297:4d6a:ea22%8(Preferred)
Default Gateway . . . . . . . . . : ::
DHCPv6 IAID . . . . . . . . . . . : 234881024
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-20-E6-98-CD-90-2B-34-72-70-BD
NetBIOS over Tcpip. . . . . . . . : Disabled
It has only one wired adapter
 
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Are you sure that the host, "DESKTOP-JF55GSH", only has one wired network adapter? I would expect two: one on the motherboard and one in the PCIe slot.

Per "ipconfig /all" if you do not have IPv6 service via your ISP then disable IPv6 on your network adapters.

What make and model router do you have?

As I understand the description of what is happening: i.e., wired works but no internet. However wireless devices have internet.

Then the pc (wired) gets internet and wireless devices lose connectivity - correct?



 
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It just shows one. I disabled ipv6 now. Model is Cisco EPC 3925-3928. Wired works then completely drops connections and shows me that the cable is unplugged while the wifi has a solid connection. Connection drops last for around 10-15 seconds and sometimes connection drops and comes back in a matter of few seconds.
 
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Wifi cannot be enabled at the same time as wired on the same computer.

One or the other - not both. (Excluding a possible "bridging" configuration which I doubt is the current situation.)

A computer should be wired or wireless - not both.

Go into Device Manager > View > Show hidden devices.

To be honest, full disclosure, this is getting a bit confusing and I think I have missed something.

The above "ipconfig" results were via "wired".

If/when wireless is working, run and post "ipconfig /all" again.

 
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The wifi connection was on the other device (android phone). I said that as a way of making you know that the internet works but there is something that drops my connection on pc since they replaced the old router with the new one.
 
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Check that the new router's firmware is up-to-date. If not, update.

Go to the manufacturer's website and look for any firmware updates matching the make, the model, and the version of your router.

Read the update instructions carefully and then update the firmware accordingly.


 
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Check the following links:

https://www.cisco.com/c/en/us/support/docs/dial-access/asynchronous-connections/9525-upgrading-modem-firmware.html

https://www.manualslib.com/manual/872214/Cisco-Dpc3928.html?page=29

You may need to google "Cisco EPC3925-3928 manual" as I did or some variation of the search words/phrasing more applicable to your circumstances.

No immediate need to react and do what some link suggests. The idea is to find more information and suggestions that truly fit your problem and environment.

Then determine what may be the most suitable option for your situation.

 
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Any someone or a particular "someone/device"?

Going back a couple of steps:

Does the following User Manual link match your device?

https://www.manualslib.com/manual/677976/Cisco-Epc3925.html#manual

Actually that device is a Gateway. There should be another device connected to the Gateway: a wireless router or access point to provide wireless service within your home.

Do your wired connections match the connections shown on page 26?

The Gateway's default IP is 192.168.0.1

Find the device providing wireless service. Get the make and model and see if you can determine the IP address that it is using.
 
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Whenever someone connects over wifi it drops connection it isnt just one particular device. Yes the manual matches it and the wired connections match it also.I can access it using that ip. I think that the problem is with the ip's. Whenever someone accesse's the network it drops me off it probably because it assings the other device the same ip address. Problem is that both wifi and wired are set to dhcp but it still fails to give the other devices a new ip that is not being used at the moment.
 
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Okay - that helped.

Start (change) your DHCP IP address range to start with 192.168.0.2

Reduce the number of DHCP Users from 119 to 8.

Your last image shows two devices being assigned static IP within the 119 address range. Specifically 192.168.0.11 and 192.168.0.12.

What I think may be happening is that your PC joins the network and gets assigned DHCP IP 192.168.0.11 or 192.168.0.12

Then one of the devices (wireless or otherwise) that has been assigned one of those static IPs comes online and you have an IP address conflict.

Find out using the MAC what two devices are using the static IP addresses of 192.168.0.11 and 192.168.0.12. Unless they are printers, NAS, scanners, a camera, etc. change them to use DHCP IP addressing with the IP address being provided by your router at 192.168.0.1





 
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Solution
Those two addresses disapeared as soon as i switched address to .2 but i'm guessing those were two android phones. Anyway i'm giving up i'll give tech support a call to come over and switch the router.Thx for the help man
 
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