Ethernet sometimes doesn't work after Windows boot/restart

So 2 weeks ago or so I noticed a started to have this strange issue that after I boot up my PC or restart it, my network status is on "connected" yet I had like no internet access, YouTube for example loads very "brokenly", like I can see only video names but cannot do nothing else, Google or Facebook just timeout.

I have another PC that is connected via Ethernet which works fine.

I tried to cancel fastboot but it didn't change a thing, I just updated around that time to version 21H2 but after un-installing it the problem still occurs.

What I currently do is either reconnect physically the ethernet cable to my PC (which doesn't always works), or I disable & enable the network via "Control Panel\All Control Panel Items\Network Connections" or sometimes the windows network diagnostic finds the following errors and manages to fixes it, problem is it doesn't always finds these errors:



Oh and I tried some guide that flushes the router and some other generic ipconfig cmd commands.

I want to diagnose if it is an hardware problem (my ethernet cable) or a software problem.

The issue may not be the cable, but rather the network card itself. You will need to troubleshoot that.

Samuria said:

Set dns to 1.1.1.1 & 1.0.0.1 open cmd prompt type

Ipconfig /all
Tracert Adobe. Com
Tracert 194.119.131.66
Post results

Here it is:

Code:

Microsoft Windows [Version 10.0.19043.1415]
(c) Microsoft Corporation. All rights reserved.

C:\Windows\system32>Ipconfig /all

Windows IP Configuration

   Host Name . . . . . . . . . . . . : Sharon-PC
   Primary Dns Suffix  . . . . . . . :
   Node Type . . . . . . . . . . . . : Hybrid
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No
   DNS Suffix Search List. . . . . . : lan

Ethernet adapter Ethernet:

   Connection-specific DNS Suffix  . : lan
   Description . . . . . . . . . . . : Intel(R) Ethernet Connection (7) I219-V
   Physical Address. . . . . . . . . : REDUCTED
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   IPv6 Address. . . . . . . . . . . :  REDUCTED(Preferred)
   Temporary IPv6 Address. . . . . . :  REDUCTED(Preferred)
   Link-local IPv6 Address . . . . . :  REDUCTED(Preferred)
   IPv4 Address. . . . . . . . . . . :  REDUCTED(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Lease Obtained. . . . . . . . . . : Friday, 31 December 2021 10:46:34
   Lease Expires . . . . . . . . . . : Saturday, 1 January 2022 2:26:04
   Default Gateway . . . . . . . . . : fe80::22b0:1ff:fe32:3fb6%7
                                       192.168.1.1
   DHCP Server . . . . . . . . . . . : 192.168.1.1
   DHCPv6 IAID . . . . . . . . . . . : 103042046
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-28-66-3A-92-24-4B-FE-7F-A9-C1
   DNS Servers . . . . . . . . . . . : 2a0d:6fc2:4db0:c500::1
                                       1.1.1.1
                                       1.0.0.1
                                       2a0d:6fc2:4db0:c500::1
   NetBIOS over Tcpip. . . . . . . . : Enabled
   Connection-specific DNS Suffix Search List :
                                       lan
                                       lan

C:\Windows\system32>Tracert Adobe.Com

Tracing route to Adobe.Com [2001:40a8:4400:4::d4c7:ca2a]
over a maximum of 30 hops:

  1     1 ms    <1 ms    <1 ms  2a0d:6fc2:4db0:c500::1
  2     1 ms     1 ms     1 ms  2a0d:6fc2:ffff::d6
  3     *        *        *     Request timed out.
  4     *        *        *     Request timed out.
  5     *        *        *     Request timed out.
  6     *        *        *     Request timed out.
  7     *        *        *     Request timed out.
  8    19 ms    20 ms     8 ms  2001:40a8:4400:4::1
  9     2 ms     2 ms     2 ms  2001:40a8:4400:4::d4c7:ca2a

Trace complete.

C:\Windows\system32>Tracert 194.119.131.66

Tracing route to cns1.uk.vianw.net [194.119.131.66]
over a maximum of 30 hops:

  1    <1 ms    <1 ms    <1 ms  OpenWrt.lan [192.168.1.1]
  2     2 ms     1 ms     2 ms  176-230-251-214.orange.net.il [176.230.251.214]
  3     *        *        *     Request timed out.
  4     *        *        *     Request timed out.
  5     *        *        *     Request timed out.
  6     *        *        *     Request timed out.
  7     *        *        *     Request timed out.
  8     2 ms     2 ms     2 ms  82.102.132.78
  9    56 ms    67 ms    56 ms  EDGE-FRA-02-ge-2-0-6-61.ip4.012.net.il [80.179.166.78]
 10    56 ms    56 ms    56 ms  de-cix1.de.clara.net [80.81.192.86]
 11    70 ms    69 ms    69 ms  tengige0-1-1-0-t6-ar14.router.uk.clara.net [195.157.3.110]
 12    68 ms    69 ms    68 ms  tengige0-1-1-0-t6-ar14.router.uk.clara.net [195.157.3.110]
 13    66 ms    66 ms    66 ms  cns1.uk.vianw.net [194.119.131.66]

Trace complete.

Samuria said:

Thats all working can you repeat when its broke and post results again

Code:

C:\Windows\system32>Ipconfig /all

Windows IP Configuration

   Host Name . . . . . . . . . . . . : Sharon-PC
   Primary Dns Suffix  . . . . . . . :
   Node Type . . . . . . . . . . . . : Hybrid
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No
   DNS Suffix Search List. . . . . . : lan

Ethernet adapter Ethernet:

   Connection-specific DNS Suffix  . : lan
   Description . . . . . . . . . . . : Intel(R) Ethernet Connection (7) I219-V
   Physical Address. . . . . . . . . : REDUCTED
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   IPv6 Address. . . . . . . . . . . : REDUCTED(Preferred)
   Temporary IPv6 Address. . . . . . : REDUCTED(Preferred)
   Link-local IPv6 Address . . . . . : REDUCTED(Preferred)
   IPv4 Address. . . . . . . . . . . : REDUCTED(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Lease Obtained. . . . . . . . . . : Friday, 31 December 2021 17:08:10
   Lease Expires . . . . . . . . . . : Saturday, 1 January 2022 5:09:32
   Default Gateway . . . . . . . . . : fe80::22b0:1ff:fe32:3fb6%7
                                       192.168.1.1
   DHCP Server . . . . . . . . . . . : 192.168.1.1
   DHCPv6 IAID . . . . . . . . . . . : 103042046
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-28-66-3A-92-24-4B-FE-7F-A9-C1
   DNS Servers . . . . . . . . . . . : 2a0d:6fc2:4db0:c500::1
                                       1.1.1.1
                                       1.0.0.1
                                       2a0d:6fc2:4db0:c500::1
   NetBIOS over Tcpip. . . . . . . . : Enabled
   Connection-specific DNS Suffix Search List :
                                       lan
                                       lan

C:\Windows\system32>Tracert Adobe.Com
Unable to resolve target system name Adobe.Com.

C:\Windows\system32>Tracert 194.119.131.66

Tracing route to 194.119.131.66 over a maximum of 30 hops

  1     *        *        *     Request timed out.
  2     *        *        *     Request timed out.
  3     *        *        *     Request timed out.
  4     *        *        *     Request timed out.
  5     *        *        *     Request timed out.
  6     *        *        *     Request timed out.
  7     *        *        *     Request timed out.
  8     2 ms     2 ms     2 ms  82.102.132.78
  9     *        *        *     Request timed out.
 10     *        *        *     Request timed out.
 11     *        *        *     Request timed out.
 12     *        *        *     Request timed out.
 13     *        *        *     Request timed out.
 14     *        *        *     Request timed out.
 15     *        *        *     Request timed out.
 16    67 ms     *        *     194.119.131.66
 17     *       67 ms     *     194.119.131.66
 18    66 ms     *        *     cns1.uk.vianw.net [194.119.131.66]
 19     *        *        *     Request timed out.
 20     *       66 ms    66 ms  cns1.uk.vianw.net [194.119.131.66]

Trace complete.

C:\Windows\system32>Tracert adobe.com

Tracing route to adobe.com [192.147.130.204]
over a maximum of 30 hops:

  1     *        *        *     Request timed out.
  2     1 ms     1 ms     1 ms  176-230-251-214.orange.net.il [176.230.251.214]
  3     *        *        *     Request timed out.
  4     *        *        *     Request timed out.
  5     *        *        *     Request timed out.
  6     *        *        *     Request timed out.
  7     *        *        *     Request timed out.
  8     2 ms     2 ms     2 ms  82.102.132.78
  9     *        *        *     Request timed out.
 10     *        *        *     Request timed out.
 11     *       72 ms    71 ms  be3576.agr41.fra03.atlas.cogentco.com [154.25.5.49]
 12     *        *       64 ms  be3187.ccr42.fra03.atlas.cogentco.com [130.117.1.118]
 13     *        *       70 ms  be2846.rcr22.fra06.atlas.cogentco.com [154.54.37.30]
 14     *        *        *     Request timed out.
 15     *        *        *     Request timed out.
 16     *        *        *     Request timed out.
 17     *        *        *     Request timed out.
 18     *        *        *     Request timed out.
 19     *        *        *     Request timed out.
 20     *        *        *     Request timed out.
 21     *        *        *     Request timed out.
 22     *        *        *     Request timed out.
 23     *        *        *     Request timed out.
 24     *        *        *     Request timed out.
 25     *        *        *     Request timed out.
 26     *        *        *     Request timed out.
 27     *        *        *     Request timed out.
 28     *        *        *     Request timed out.
 29     *        *        *     Request timed out.
 30     *        *        *     Request timed out.

Trace complete.

Samuria said:

Can you try another known cable it still works when it broken but not fully worth putting it in another router port

So just a little update, I tried another port & bought a new CAT-7 cable to try it too, both didn't fix the issue.

Hi there. Maybe it is not just you... I've had the exact same problem on 1 of the desktop PC's I look after. Every week as part of maintenance, I reboot them. On December 18 and again yesterday (January 15), one of the PC's failed to start the network (a wired CAT6 1Gig connection to switch) on reboot. I fixed it the first time by simply rebooting the system - it worked, and yesterday by running the network troubleshooter. No cables were touched - or disturbed (on either end). Seems random, but it has now happened twice...

I do not yet know the root cause, but it never happened prior to December (never prior to the Win 21H2 update, though this may be just a coincidence). The PC is a Lenovo SFF desktop that has been rock solid.

If I figure out anything that might help you, I'll post an update.

- - - Updated - - -

imso3k: Just an idea for you to consider. Have a look under Windows Updates and see if you have any Optional Updates pending related to your network driver chip. If so, you might want to apply them and do some reboots to see if it helps.

If it does, then your problem may be solved. If not, then look to see if your vendor directly offers an update. For example, my problem child PC uses an Intel 82579LM (queried via Windows Drivers) and I see that Intel has an updated driver posted on December 9th of 2021. I might apply that next time I am on-site where my problem machine is located (I won't be changing drivers while remotely connected).