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Networking issues Hi, I have an extended star network, with ISDN links connecting all spokes to the central hub. On the central hub i am hosting an application. At each of the spokes i am running a wireless network. I have over 400 spokes, in which the wireless network runs fine. One spoke intermittentally gets a DHCP leased IP address and DNS doesn't work at all. The application is IP based and hence fails, intermittently. When i try to assign a static IP to the wireless device it can not get on the network, unless i assign an IP outside of the DHCP scope but inside the LAN's subnet. I have replaced the router and the switch with new ones that have been tested and worked. I have disconnected the wireless network from the LAN of the problematic spoke and validated it works by taking it to another site and running it successfully. I have also replaced the wireless devices on numerous occasions. I get 4000+ms pings from the wireless device to the application host and sometimes i cannot even ping the DHCP server. What else can i do to get my application working?

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Re: Networking issues

Hi gymny,

The best connectivity in hosting application is using virtual ip network. Normally DHCP always changing IP in everytime your computer reboot or shutdown.

Hope this will be helpful to your problem.

Best regards,


Posted on Oct 24, 2007

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I have installed windows XP SP2 on a Dell Inspiron 1501, I have downloaded and installed drivers but I cannot connect to Internet. The bars in the taskbar show an excellent signal but the computer icon for...

First try to determine whether you can connect to the Internet You should first try to determine whether you can connect to the Internet. If you can connect, the error message is obviously incorrect. If that is the case, you might want to disable the error message. To disable the error message, follow these steps.
  1. Click Start, and then click Run.
  2. In the Open box, type ncpa.cpl, and then press ENTER. The Network Connections dialog box opens.
  3. Double-click Local Area Connection, and then click Properties.
  4. On the General tab, click to clear the Notify me when this connection has limited or no connectivity check box.
  5. Click OK, and then click Close.

Check for other causes and solutionsIf you cannot connect to the Internet, you have to find the reason. Realize that the reason may not be with your computer, but may be an issue with your Internet service provider (ISP) or with issues on the network at your work. Therefore, for some of these solutions, you might need help from your ISP, or, if your computer is part of a network at work, you may have to ask your network administrator for help. Contact your ISP serviceIf you use an ISP to connect to the Internet, before you go any further, first contact your ISP to see whether it is experiencing any problems. If the ISP has problems, wait until the problems are resolved before you continue to troubleshoot. Check the hardware devicesIf you still cannot connect to the Internet after you have confirmation that your ISP is not experiencing any problems, manually check the hardware devices on your small office network or your home network for problems. For example, if a hub, router, modem, or access point is installed on your network, check that it is connected correctly, and that it is turned on and functioning properly. The solution might be as simple as turning on or restarting a hardware device, and then restarting your computer. For more specific troubleshooting information about the hardware devices that you are using, refer to the hardware documentation for your devices. Run the Network Diagnotics tool If checking and restarting your hardware device did not resolve the issue, your computer may have a networking problem. For example, your computer may not have an IP address or your TCP/IP settings may be corrupted.

There are tools available in Windows XP that you can use to help you diagnose and troubleshoot networking problems. To use the Network Diagnostics tool to determine the source of the issue, follow these steps:
  1. Click Start, and then click Help and Support.
  2. Under Pick a task, click the link to Use Tools to view your computer information and diagnose problems, and then click Network Diagnostics in the list on the left.
  3. Click Scan your system. The Network Diagnostics tool collects configuration information and performs automated troubleshooting of the network connection.
  4. When the process is complete, look for any items that are marked "FAILED" in red.

    Note If you do not see any categories that failed, please see the "Additional troubleshooting information" section for more information about how to troubleshoot network problems.
  5. Expand a category to view the testing results. For example, to check the results for TCP/IP settings, expand the Network Adapters section. Then, check whether a network adapter has failed.
  6. You can use that information to try to resolve the issue yourself, or you can provide the information to your network administrator for help. If you are not sure how to use the results from the Network Diagnostics tool to resolve the issue, see the "Next steps" section for help.
Additional troubleshooting information for TCP/IP issues For more information about how to troubleshoot TCP/IP networking problems and use the Network Diagnostics tool, click the following article number to view the article in the Microsoft Knowledge Base: 314067 ( ) How to troubleshoot TCP/IP connectivity with Windows XP For more information about how to troubleshoot home networking in Windows XP, click the following article number to view the article in the Microsoft Knowledge Base: 308007 ( ) How to troubleshoot home networking in Windows XP If the Network Diagnostics tool did not help you resolve the issue, try the next solution "Check the hardware device" in this article for help.
Check the network adapter on your computerIf you did not find a resolution by using the Network Diagnostics tool, check the network adapter on your computer to make sure that it is enabled. If it is enabled, you can sometimes solve connection problems by disabling and then re-enabling the adapter. If you are not sure how to check the network adapter, check the help that is provided with the network adapter.
Check your Dynamic Host Configuration Protocol (DHCP) serverIf the network adapter is working correctly, the next thing to check is whether your DHCP server is down or is not available on the network.

To troubleshoot issues with the DHCP server, it is important to know where the DHCP server is located. If you are not sure, it is probably hosted by your ISP (if you use an ISP), on another computer (if you are on a work network), or on a router (on your small office network or home network). Use the following suggestions, depending on the network setup:
  • If you use an ISP

    If you have not already done this, contact the ISP to see whether they are experiencing any problems. If they are, wait until their problems are resolved. If the ISP is not experiencing any problems, this is probably not the problem that is causing the issue.
  • If you are on a work network

    On a work network, the network administrator probably maintains the DHCP server and should be able to tell you if the server is down or has problems. Let them know that you have problems with your Internet connection, and see whether they can help you. If you do not have a network administrator or other support person to contact for help, you can use the Microsoft Customer Support Services Web site to find other solutions to your problem. See the "Next steps" section for more information.
  • If you have a router on your small office network or home network

    If you have a router on your small office network or home network, then the DHCP server might be hosted on the router. If you have not already done this, check that the router is working correctly. For example, you can check whether the router is turned on and that the wires are connected correctly. You might have to check the router documentation for troubleshooting help if you are not sure what to do, or contact the person who set up the network for help.
Check your Wired Equivalent Privacy (WEP) keyIf your computer uses a wireless network, you may be required to supply a WEP key. (A WEP key is a network security key that is used to help protect your wireless network.) If you supply an incorrect key, or if you do not have a WEP key set, you will be unable to connect to the network. Therefore, make sure that you have the correct WEP key if it is required. For more information, see the help provided with your wireless network device or ask the person who set up the wireless network for help.

If these troubleshooting steps did not help, see the "Next Steps" section for other sources that may help you resolve your problem.

Jun 12, 2011 | Routers

1 Answer

Wireless connection problem


go to following link it will give you all your solution for wireless networking

Jul 24, 2010 | Linksys WRT54G2 Wireless Router

2 Answers

What is a Lucent Pipeline P130-u-v35-asa used for

The short answer is.... It is a T-1 Router/Firewall that works with ISDN and Frame Relay. It uses the V.35 and BRI interfaces and requires an external CSU/DSU. It is NOT compatable with Cable or DSL internet service providers.

Oct 29, 2009 | Lucent Pipeline 130 Router

2 Answers

DIR 615 router. Host computer can not find network.

I dont know your router personally but what you need to do is setup a network bridgefull explanation is given here

Oct 27, 2009 | Routers

1 Answer

I cant connect to two computers at the same time

How to connect....

1- Two Computers:

# We are connect two computers together to share Internet, printer, scanner, files, and even programs

We can do it through either way:

1- Use A Crossover Cable And Two Network Cards.Two network cards are installed in two computers.Then use crossover cable to connect them.

2- Use a Phone Line and Two Special Adapters Sold as "Phone line network Kit". Two adapters are installed in two computers. Then use existing Phone line to connect them.

Connecting Two Computers Wirelessly:

1- Wi-Fi
2- Bluetooth
3- Infrared

Several types of fixtures exist for home networking:

1- Hubs
2- Switches
3- Routers

2- Computer with the internet

Before you can connect to the Internet and access the World Wide Web, you need to have certain equipment. In brief, you must have:

-A computer (preferably running an up-to-date operating system); -
-A modem and access to a telephone line or a local area network (LAN) that is in turn connected to the Internet; and connection software that will allow you to establish an account with a service provider and access the Internet

You Need:

Modem: This converts your digital computer information into analogue telephone signals. Phone Line: his may be your biggest expense after the equipment.

Internet Service Provider (ISP): ISP has a permanent connection to the Internet.

ADSL: a newly standardized transmission technology facilitating simultaneous use of normal telephone services, data transmission of 6 Mbit/s in the downstream and Basic-rate Access (BRA).

ADSL facilitates the simultaneous use of normal telephone services, ISDN, and high speed data transmission.

Another advantage of having an ADSL line is not missing calls while you're online, as both voice and data can be transferred at the same time.

Jun 19, 2009 | D-Link AirPlus Xtreme G DI-624 Wireless...

2 Answers


yes it is possible: if u are trying to get broadband on all 3 pc's then go for WIFI if ur router in wifi enabled ...
If u are trying to setup a network b/w 3 pc's then u will have to get a networking hub .
Network can established b/w two pc;s by connecting the with simple ethernet cable known as a CAT cable or LAN cable and making a bridge between the two computers but in order to establish a network b/w 3 pc's then u will have to get a network hub which will support many connections at one time.

Feb 18, 2008 | Routers

1 Answer

Cant connect to cable

Hi Snuggles,

Make sure your networking permissons are setup properly, on the Vista. Since it varies with what version Vista you have, try this link.

Great help site for Vista. Click on the Network tab, follow the info to setup your networking, and if you are still having issues, got to the troubleshooting. Please make sure you doing your setup with a cable, too, not over the wireless.

Good luck

Jan 10, 2008 | NetGear DG834G Router

1 Answer

Home wireless network

Most wireless1.gif networks are setup as infrastructure networks, meaning all communication is to/from a wireless access1.gif point/router that serves the same function as a switch/hub in a wired network as a central point to transfer communications from machine to machine. One works over the air the other through a wire.

There is an alternate form of wireless networking1.gif refered to as ad hoc -- in this version of wireless networking every wireless adapter1.gif can "talk" to any other wireless adapter configured with the same SSID (name) and security encryption (none, WEP, WPA). This is how somewhat less impromptu wireless networks are created similar to impromptu infrared networks some of us have used. One limitation of the ad hoc networks I have seen configured to date is access to the internet. I have posted an article where a stationary PC (required to be running for any other wireless machine to access the internet) with a wireless card in ad hoc mode could act as the router for wireless network but it required a cabled connection the internet. I suppose it could be a second wireless connection on a separate channel with a second wireless adapter in an infrastructure network but why? These types of networks are only recommended in another article for a limited (small) number of machines.

Based on this are you asking to create an ad hoc network to connect 2 PC's1.gif wirelessly without a wireless router1.gif or access to the internet from the wireless network (without a dedicated machine)?

Dec 19, 2007 | Linksys Wireless-G Broadband Router

1 Answer

Connection Issues Occur When I Try to Connect Through a Broadband Network Adapter

To resolve this issue, remove the network bridge. To do so, follow these steps: 1. Click Start, and then click My Network Places. 2. In the left pane, click View Network Connections. 3. Look for any connection that is bridged. 4. Right-click the bridged connection, and then click Remove From Bridge. 5. Repeat step 4 for each connection that is connected with a bridge. 6. When the bridge is removed from each network adapter, right-click Network Bridge, and then click Delete. 7. Click OK. When the all the bridged connections and the network bridge are removed, the broadband hardware is automatically detected.

Feb 16, 2006 | Microsoft Broadband Networking MN-100...

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