Internet goes off

kay5ive

Reputable
Jan 23, 2016
8
0
4,510
Hi,
I have 1 wireless USB LAN and 1 builtin LAN card in my PC, i am using windows 7.
Both Wireless and LAN card on DHCP. When i enable LAN card then the internet goes off and no browsing. When i disable LAN card the internet works wel. Why? I need sharing to connect other PC's into the network.
 

Ralston18

Titan
Moderator
Please clarify: As I understand it you are using both the built in LAN card and the wireless USB card at the same time: both enabled?

Is that correct?

Are you trying to use the PC to wirelessly connect to a router and then use the built in LAN card to connect another PC or device.

You need to provide a more detailed description about your network and what you are trying to do.
 

kay5ive

Reputable
Jan 23, 2016
8
0
4,510


I want to use USB Lan for internet and this is connects with wireless router. And builtin LAN card connects with my CISCO E1000 router with 4 PC's just for sharing resources.
 

Ralston18

Titan
Moderator
Thanks.

Cable modem ---------> Wireless Router which uses wireless to connect to PC via USB wireless adapter. (Any other wireless devices?)

PC Built-in LAN ---------> CISCO E1000 Router --------> (x4) to other PC's.

The PC with Built-in LAN being the device that shares a printer, a NAS, or other resource. Correct?

Are the two "neworks" to be completely separate?

And there may be some additional details etc., to be taken into consideration. E.g., only one router can be assigning IP addresses. Probably the wireless router.

Fortunately there are other similar postings in this forum. Look for wireless access points, bridging (perhaps), subnetting, internet connection sharing....


Here is one such thread. There are others.

http://www.tomshardware.com/answers/id-2772093/wireless-adapters-connect-networks.html

Probably the overall consideration is the assignment of IP addresses via DHCP and the subnetting necessary to separate the USB LAN from the "CISCO" LAN.

Diagram the desired network and include the internal IP address assignements (DHCP, Static) along with the subnetting being used. Please include in the make and model of the wireless router.

That will provide a clearer understanding of your network and identify what changes are necessary to meet your network requirements.
 

kay5ive

Reputable
Jan 23, 2016
8
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4,510


i want to show the diagram. how can i post it here?
 

kay5ive

Reputable
Jan 23, 2016
8
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4,510


2ltg0ee.png
 

Ralston18

Titan
Moderator
And your objective is that the Wi-Fi Router for "internet thrower" provides internet access for the four PC's via a wireless connection to PC 1.

What make and model router is the "internet thrower"? Or is it a cable modem/router? Do you have access/administrator rights to that device?

What is the distance between that device and the Cisco E1000? Can you run an ethernet cable?

I think that this is all being overcomplicated a bit: Is there a reason that PC's 2, 3, and 4 need to go through PC1 for internet access?



 

kay5ive

Reputable
Jan 23, 2016
8
0
4,510

TP-Link wireless N router and its not cable modem. yes, i have administrative rights. The distance is too far from each other but i dont want to join cisco with n router. yes, i run ethernet cable too. i don't need the pc's 2,3 nd 4 to go through internet.
 

Ralston18

Titan
Moderator
By network sharing you mean file and printer sharing vs. internet sharing....

I think that this is the network configuration that you should be working on:

Your internet service comes into a modem which is connected (wired) to the TP-Link wireless N router. The current internal/private IP address for the TP-Link router is 192.168.1.1 with a subnet mask of 255.255.255.0. Is that correct? (That is the default setting, hopefully the default internal IP address has not been changed.)

The TP-Link wireless router will be responsible for assigning IP addresses to PC1, PC2, PC3, and PC 4.

The TP-Link wireless N router then connects wirelessly to the Cisco E1000 router.

The Cisco E1000 router will have wireless turned on and be configured as a wireless access point for PC1, PC2, PC3, and PC4. It will need to have its DHCP turned off.

The Cisco E1000 will be assigned a static IP address via the TP-Link wireless N router's IP addressing scheme. You will need to use a temporary wired connection to configure the Cisco E1000 IP's static address at 192.168.1.2 with subnet mask 255.255.255.0 (You will also need to set the TP-Link router up so it will not re-use or assign that address again. Most likely, provided I am not going too far astray here, you will configure the TP-Link router to use the IP range 192.168.1.4 to 192.168.1.7 as the IP's addresses to use for dynamic assignment.

The Cisco E1000 router has its four LAN ports connected via ethernet cable to PC1, PC2, PC3, and PC4

The wireless LAN adapter in PC1 will not be needed and can be disabled.

You need to configure the wired LAN adapters in PC1, PC2, PC3, PC4 to get their IP addresses via the TP-Link and DHCP (Gateway 192.168.1.1, subnet mask 255.255.255.0).

All four PCs should then be on the same network for network file and print sharing. You may need to turn on print and file sharing for each computer if that has not already been done.

Please note that the four PCs will have internet access unless you block or otherwise disable that.

Again just sketch it all out, plan the IP addressing, and let me know if something does not make sense or if I have gone off track. Likewise, someone else reading these postings may jump in (which is welcome) and offer other suggestions. That is okay. There could be a better way.
 

Ralston18

Titan
Moderator
Yes you did mention that but I had it in my mind to mean no physical (wired) connection. You actually mean no network connection....

So you want to have PC1 to be part of a wired network that includes PCs 2,3, and 4 so all four PCs can share files/printing. No internet access for PC1,2,3, or 4 needed.

But at the same time you want PC1 (as a single device) to be part of a wireless network connecting wirelesssly to the internet via the TP Link "internet thrower" router. So PC1 will have internet access.

As your original post shows - that does not work. And as I currently understand it all, it will not work.

PC1 cannot be in two different networks at the same time. I.e., the USB LAN adapter (wireless) and the Built-in LAN adapter (wired) enabled at the same time.
 

kay5ive

Reputable
Jan 23, 2016
8
0
4,510


PC2 is connected with crossover cable with PC3, both are enabled with print and file sharing. They also use internet with another Wi-Fi internet USB device. How they work then?
 

Ralston18

Titan
Moderator
kay5ive,

I can no longer see the diagram that you provided but I do not remember seeing the PC2 to PC3 crossover cable or a reference to using the internet with another Wi-Fi device. Did you make some changes to your network? Do you truly have a crossover cable or just a standard Ethernet cable between PC2 and PC3?

When troubleshooting it is very important to keep things consistent and only change one thing at a time.

Otherwise identifying the problem you originally described is going to be difficult and not easy to solve. Trusting that a solution is viable in the mixed environment that you have set up.

I am starting to believe that you are confusing 3 things: 1) file and print sharing, 2) internet access, and 3) the network concept itself. Not a criticism, just an observation. All overlap and there are dependencies....

On a network there can be a problem where only some things work and not others. Could be the physical connectivity, the device configurations, or the devices themselves. To get everything to constantly work requires that the network be set up correctly - e.g., no duplicate IPs, static IPs outside of the available DHCP ranges, the correct LAN to LAN or WAN to LAN ports being used....

And if you are, for example, attempting to tap into another wireless device or network without access to the source router then it is unlikely that you will get it all to work.