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Limited or no connectivity - realtek 8139/810x

3052 Views 15 Replies 2 Participants Last post by  johnwill

I am trying to make use of my old computer. Last time i used it few months ago on ADSL (ADSL Router -> comp) and everything was working fine.
Now it looks like:
1. DSL modem
2. Linksys WRT54GL connected: 2 wired comps + wired 2nd router
3. D-Link DIR-300 connected: 1 wired working comp + 1 Wifi laptop + wired not-working

Now i keep getting limited or no connectivity error.
neither LAN or Internet working
there is question mark on networking controller in hardware management

Right now i don't have any firewall or antivirus installed except windows default (disabled).

Things i've tried:
- 4 different cables (w/o broken cables)
- getting new drivers
- uninstalled firewalls and antivirs
- reinstalling drivers (NIC setup + hardware management uninstalling)
- trying to run automatic configuration
- force assigning TCP/IP settings
- PING router "Destination host unreachable."
- winsock refresh and some other commands i dont remember

Operating system is Windows XP Home Edition v5.1 build 2600 (dxdiag info)
Network card is Realtek 8139/810x
connection type: wired
more info (in polish, guess google translator should handle that): - ipconfig /all - nbtstat -n - dxdiag report - Everest report
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How are you using two routers?

Do those computers work if you connect them all the the primary computer and remove the D-Link from the picture?

If you want to connect the secondary router, here's the recipe for making it work.

Connecting two (or more) SOHO broadband routers together.

Note: The "primary" router can be an actual router, a software gateway like Microsoft Internet Connection Sharing, or a server connection that has the capability to supply more than one IP address using DHCP server capability. No changes are made to the primary "router" configuration.

Configure the IP address of the secondary router(s) to be in the same subnet as the primary router, but out of the range of the DHCP server in the primary router. For instance DHCP server addresses through, I'd assign the secondary router as it's IP address, for another router, etc.

Note: Do this first, as you will have to reboot the computer to connect to the router again for the remaining changes.

Disable the DHCP server in the secondary router.

Setup the wireless section just the way you would if it was the primary router, channels, encryption, etc. Note that you should use the same SSID and encryption key for the secondary router but a non-conflicting channel. I recommend channels 1, 6, or 11 for use for the best results.

Connect from the primary router's LAN port to one of the LAN ports on the secondary router. If there is no uplink port and neither of the routers have auto-sensing ports, use a cross-over cable. Leave the WAN port unconnected!

This procedure bypasses the routing function (NAT layer) and configures the router as a switch (or wireless access point for wireless routers).

For reference, here's a link to a Typical example config using a Netgear router
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It is not about router not working, everything IS WORKING (2 routers+inet, 2 wired and 1 wifi computers) for over half year.

The only "broken" part is my old computer i try to get running once again and whole topic is about that single computer not being able to connect to LAN (not even talking about inet).
Whole rest of info is "just in case" and can be ignored, i've read few other topics and just added every piece of info i could get in first post.
The only thing I see on your list that you didn't try is a new Ethernet adapter for the machine.
i bought new network card, somehow happened that it was exact same model with different box and label.

I tried turning comp on without any network card inside and it still finds "network controller"
*there was also ISDN card, took it out too and it was that "network controller"

but still i have no idea why LAN isnt working, even reinstalled system.
If you've installed a new adapter, let's see this.

Hold the Windows key and press R, then type devmgmt.msc

Please respond to all the following steps.

  1. Under Network adapters, please tell me all the devices listed.
  2. Are there any devices under Network adapters that have a red x displayed?
  3. Also, are there any devices anywhere in the Device Manager display with yellow ? or ! displayed?

It would be best if you could post a screen shot of Device Manager with the Network adapters and Other devices sections expanded.

To post a screen shot of the active window, hold the Alt key and press the PrtScn key. Open the Windows PAINT application and Paste the screen shot. You can then use PAINT to trim to suit, and save it as a JPG format file. To upload it to the forum, open the full reply window and use the Manage Attachments button to upload it here.
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Since i have installed all possible motherboard drivers and removed ISDN card there aren't any "other devices".

As a network adapter there is only: Realtek RTL8139/810x Family Fast Ethernet NIC #2
with usual appearance as working device.

the card was new, even though same model.... had different MAC i had to add to router xD
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I never use MAC filtering, it's a mostly useless security measure, and will only bite you in the butt, as you have found out. :smile:
it's not useless, i'm running wifi without passwords, only security is that it's hidden (seems like doesnt even appear as unnamed wifi) and that it has mac filter.

i know somebody could hack, but people around my house arent so advanced ^^
First reason is that any kind of encryption makes impossible for mobile devices (phones, pda) hard to connect from behind first wall and almost impossible from behind second.

Second reason is that i simply do not need better security. I am living at city borders and there isn't anyone who would try connecting to my wifi unless i run it wide open to everyone.
Actually, I don't know of a single WiFi enabled phone that doesn't offer at least WPA encryption, so I don't see that as an issue.

It's your network, if you want to run with no effective protection, I can't stop you. :smile:
it supports even WPA2, but just fail to connect when there is too much in between router and phone.
Sounds like time for hi-gain antennas on the router. :smile:
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