Why can I connect to private network but other times can't?

July 24, 2018 at 13:19:02
Specs: Windows 10
I'm running a Dell XPS laptop. I am physically connected to the ethernet. Usually when I come into work and plug my laptop in I can get into the network just fine, but occasionally (like once a week) I can't connect. Sometimes this issue will go away after 5-10 minutes and then it will come back.

The desktop computers are not having this issue. However, the biggest change we've recently had is the main computer that acts as the "server" is brand new. It's a fully loaded Dell.

I've done a lot of work since we made this switch making sure all the folders are shared etc. We had some initial issues with the network being shared and then suddenly stopped, but I believe I have fixed those problems because they haven't popped up anymore. My two guesses are: 1) perhaps the router needs to be updated... it isn't exactly new. 2) perhaps it has something to do with dynamic IP. Another employee who has the same laptop as me has had this issue as well. She's on the Wifi network and has issues printing as well as getting access to programs that need access to the network.

For the record, this is a small business with 5 people at the office. As the youngest person here I am the IT guy.


See More: Why can I connect to private network but other times cant?

Reply ↓  Report •

#1
July 24, 2018 at 13:56:39
When you plug the ethernet cable into the laptop, is the laptop already booted? You may have to reboot for it to be recognized by the network.

Reply ↓  Report •

#2
July 24, 2018 at 21:30:01
You can also try a different network cable in case the plug is bad. Also look into the RJ45 jack in the laptop to see if the thin gold plated wires are all even and parallel to each other. If you attempt to nudge one back into alignment, do it with the laptop off.

You have to be a little bit crazy to keep you from going insane.


Reply ↓  Report •

#3
July 25, 2018 at 07:08:03
Usually when I come into work and plug my laptop in I can get into the network just fine, but occasionally (like once a week) I can't connect.

From the sounds of it, when it's not working, you're just plugging in and it doesn't work..........as compared to, "it was working and then stopped". If my assumption is correct (feel free to clear it up if I'm not correct) then it sounds like your DHCP service is having an issue.

Since you're likely running DHCP on your router (again, correct me if I'm wrong) then this does point toward a router issue. Updating the firmware on the router might fix the issue, so you might want to try that before replacing the unit. If that doesn't fix the issue, then you will likely have to replace it.

Now, having said that..............do the following the next time you plug your laptop in and can't get a network connection:

Open a command prompt window and run the following command:

ipconfig /all

What does your IP address show? If it's an APIPA address (ie: 169.254.xxx.xxx) then you did not receive one from DHCP. If that 's the case issue the following two commands in order:

ipconfig /release
ipconfig /renew

You may have to wait a few seconds on the "renew" command to complete. After you get your prompt back, try the ipconfig /all command again. If you still have an APIPA address then you're definitely not communicating with the DHCP server and you need to troubleshoot whatever device is running your DHCP service.

If you have a proper IP address and can now communicate with the LAN and internet then let us know and we'll have a look at what the underlying problem is.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


Reply ↓  Report •

Related Solutions

#4
July 25, 2018 at 09:54:07
Well, I did the classic "reboot" and it worked this time... however I know in the past restarting my computer hasn't solved the issue. So I will keep you updated if that doesn't solve the issue. Thank you.

Reply ↓  Report •

#5
July 25, 2018 at 11:27:11
I know in the past restarting my computer hasn't solved the issue

This points to either a DHCP server (router) issue, or a basic connectivity issue (ie: network interface on your PC or the cable).

While you're doing some basic troubleshooting if the steps I offered above doesn't get your PC communicating on the network, immediately (before doing anything else) recycle the power on your router (ie: shut it off for 10 seconds, then start it up again) and try the "/release/, /renew" commands again. If it works after rebooting the router that is pretty definitive evidence the router is faulty.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


Reply ↓  Report •

#6
July 26, 2018 at 09:48:17
Thank you Curt. So this morning the restart isn't solving the problem. I've "released" and "renewed" to no avail.

Default Gateway . . . . . . . . . : 192.168.0.1
DHCP Server . . . . . . . . . . . : 192.168.0.1
DHCPv6 IAID . . . . . . . . . . . : 570426651

I guess the weird thing about the router being the issue is that all the desktop computers are not having this issue. And it seems like this has been more of an issue for me since the boss got a new computer.

There is another chance it is the adapter I have, but it's not even a year old.
Description . . . . . . . . . . . : ASIX AX88179 USB 3.0 to Gigabit Ethernet Adapter


Reply ↓  Report •

#7
July 26, 2018 at 10:20:49
To further the mystery - I can connect to other computers on the network. I just can't connect to the new PC where we keep all the data. So now I believe it's something on his computer. It's just weird because this problem comes and goes!

Reply ↓  Report •

#8
July 26, 2018 at 11:45:55
To further the mystery - I can connect to other computers on the network.

Are you talking about rebooting them just to see if they fail to connect or not? If yes, and when you're rebooting the other computers they don't ever have this issue then you've pretty much narrowed it down to the one PC.

Someone else mentioned replacing the network cable cable. I would definitely try that. If you can, swap it with another computer that never has this problem. If the problem follows the cable, you have your answer. If it doesn't, then you should see if there are any newer drivers for the network interface on that PC and if there are, install them.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


Reply ↓  Report •

#9
July 26, 2018 at 15:33:36
IS the Ethernet port on your portable not working?
Why using an external USB to Ethernet device?
Drivers: http://www.asix.com.tw/products.php...
Try on different USB ports.

Electronic devices failure is arbitrary. It can fail after day 1 or after 10+ years. Aging is only a small factor.


Reply ↓  Report •

#10
August 2, 2018 at 11:41:37
my computer is far too "advanced" to have an ethernet port. I don't believe the port is the issue because I can connect to all other pcs on the network and the internet just fine. Should I make that other PC (the one I cannot connect to) a static IP address? It does act as a quasi server for the rest.

Maybe I should start a new question thread with:

"My laptop can connect to every pc except one, but all others can connect to the pc I can't connect to

but that's too wordy.


Reply ↓  Report •

Ask Question