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Administrator
Group: Administrators
Last Login: 8/22/2008 10:02:32 AM
Posts: 2,102, Visits: 2,247 |
| Below are some of the many tools available to you built into Vista in order to help you figure out your problem. I suggest trying them, watching the effect and if it does not help make sure to bring it back to its original state.
Update your NIC drivers or rollback:
Many times windows update will install a newer driver which causes problems with your existing card. Something reverting back to the Microsoft driver will fix the problem rather then using the Manufacturer Vista drive. The opposite can also be true.
How to assign static IP's in Vista:
Go to you "Network and Sharing Center" on left side click "Manage Network Connections" then right click the appropriate connection and hit "Properties". Under the properties of TCP/IPv4 or v6, you enable DHCP and select Alternative Configuration. then add static IP address. You can assign static IP address and then select Advanced to assign additional IP addresses.
Disabling Auto-Tuning:
Vista introduces a new feature called “Receive Window Auto-Tuning”. What it does is to adjust the receive windows size continually based upon the changing network conditions. You can see this article if you are interested in details.
Some people report that auto-tuning can cause network time out problems with specific applications and routers. You can turn it off by:
1. Open up an elevated command prompt.
2. Enter the following command to disable auto-tuning
netsh interface tcp set global autotuninglevel=disabled
If you found that this doesn’t fix your problem, you can turn it back on.
1. Open up an elevated command prompt.
2. Enter the following command to enable auto-tuning
netsh interface tcp set global autotuninglevel=normal
You can use this command to view the states of the TCP global paremeters.
netsh interface tcp show global.
This command is also known to correct problems for people who cannot access HTTPS sites using IE7 in Vista, and logon problems with various messenger applications.
How to Disable TCP/IP V6
Navigate: Start>Network>Network and Sharing Center>Manage Network Connections. Open the properties of the connection. Uncheck TCP/IPv6.
Can't receive IP from a DHCP Server
Symptom: A Vista is setup to obtain an IP address from a DHCP. However the Vista cannot receive an IP address from the DHCP. If you assign static Vista, you can access other remote computers and the Internet.
Solution: To resolve this issue, disable the DHCP BROADCAST flag in Windows Vista. To do this, please follow these steps:
1. Run regedit from the Vista.
2. Open the following registry subkey:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{GUID}
In this registry path, click the (GUID) subkey that corresponds to the network adapter that is connected to the network.
3. On the Edit menu, point to New, and then click DWORD (32-bit) Value.
4. In the New Value box, type DhcpConnDisableBcastFlagToggle, and then press ENTER.
5. Right-click DhcpConnDisableBcastFlagToggle, and then click Modify.
6. In the Value data box, type 1, and then click OK.
7. Close Registry Editor.
The 0.0.0.0 gateway problem resulting in limited connectivity:
This is a problem I had recently after having problems w/ my router. Open the command prompt and be sure to right click it and hit "Run as Administrator" then type IPconfig /all. Your results will look something like this for each network adapter you have installed:
Physical Address. . . . . . . . . : 00-18-F8-29-BF-52
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::b1b6:632f:6a0b:57ee%8(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.100(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Monday, May 21, 2007 10:05:20 PM
Lease Expires . . . . . . . . . . : Tuesday, May 22, 2007 10:05:20 PM
Default Gateway . . . . . . . . . : 0.0.0.0
192.168.1.1
See how the default Gateway has a 0.0.0.0 and a 192.168.1.1? This is causing the problem. To fix this on the command prompt type the following:
route delete 0.0.0.0
and then
ipconfig /renew
Easy Resolutions of Vista Unidentified Network or Limited Connectivity
The Vista Unidentified Network or Limited Connectivity could be hardware, TCP/IP configuration or security issues. The following are some resolutions.
1. If it works before but now, you may re-set router or modem.
2. If other Vista computers work and only one Vista has this issue, upgrade the NIC driver or replace it with different NIC. This post may help too.
3. If XP works but Vista doesnt, check if there is any new firmware for the router or new driver for the NIC.
4. Some old router and NIC doesn’t support IPv6, you may want to disable IP6v on Vista TCP/IP settings, re-configure the NIC speed or install Microsoft update.
5. If you have 3rd party security software like Norton and McAfee, double check the settings or disable it for the test.
How to tell if software is causing the connectivity problem:
To troubleshooting spyware, virus and other issues when you cannot determine the cause of the issue, you may run Windows Safe Mode or Safe Mode with Network. With MSCONFIG, you also can configure a clean boot to disable common startup programs, settings, and drivers to eliminate possible software conflicts. This will give you a chance to try to connect to the internet without all the garbage apps loading up which may be blocking it. To perform a clean boot, please follow these steps:
1) Run MSCONFIG.EXE.
2) In the Services tab, click "Hide All Microsoft Services" and click
"Disable All".
3) In the Startup tab, click "Disable All". Click OK. (This will
temporarily prevent third-party programs from running automatically during
start-up.)
Eliminating your router from the problem
Run the Vista Router Test which will determine if your router supports the new tcp/ip stack used by Vista.
http://www.microsoft.com/windows/using/tools/igd/default.mspx
Networking on my Vista computer stops working on a daily basis after resuming from sleep"
Change your power settings to "High Performance"
Enabling NetBIOS over TCP/IP in Vista:
# Click Start.
# Select Network.
# Click on the Network and Sharing Center.
# Click Manage Network Connections.
# Right click on the Connection and select Properties.
# Highlight Internet Protocol version 4 (TCP/IPv4) and click Properties.
# Click the Advanced button in the General tab.
# Click the WINS tab.
# Click the Enable NetBIOS Over TCP/IP button.
# Click Ok to close.
AMD64 X2 5200+ 2.60GHz | 3GB DDR 667 | RAID 0 SATA3.0 WD Caviars 320GB total | Foxconn MCP61VM2MA-RS2H Geforce 6100 nforce400 chipset | Vista Ultimate x86
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