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I-333 If you are troubleshooting clients running TCP/IP and you arent using DHCP (shame on you), you often need to adjust particular settings. Using the remote capabilities of Regedt32, you are just a few registry entries away from tweaking TCP/IP to your hearts content. These registry entries store most of the standard TCP/IP information.
Hive: | HKEY_LOCAL_MACHINE |
Key: | System\CurrentControlSet\Services\Tcpip\Parameters |
Value Name: | Hostname |
Data Type: | REG_SZ |
Value: | <computer name> Example: BigDog |
This value is the DNS name of your computer. When users issue a ping -a 200.200.200.1 command, your system returns this value.
I-334 | Hive: | HKEY_LOCAL_MACHINE |
Key: | System\CurrentControlSet\Services\Tcpip\Parameters | |
Value Name: | IPAddress | |
Data Type: | REG_MULTI_SZ | |
Value: | any valid IP address. Example: 200.200.200.1 |
This value is the IP address of a particular machine. Issuing a ping -a <hostname> command returns this value.
I-335 | Hive: | HKEY_LOCAL_MACHINE |
Key: | System\CurrentControlSet\Services\Tcpip\Parameters | |
Value Name: | SearchList | |
Data Type: | REG_SZ | |
Value: | any valid list of DNS suffixes. Examples: .com .org .edu |
When your system tries to resolve a <machine name> via DNS, it applies this list of suffixes to the generic <machine name>. If you specify bigdog.winntmag, the first suffix applied to this request is .com. The resultant query then searches for bigdog.winntmag.com.
I-336 | Hive: | HKEY_LOCAL_MACHINE |
Key: | System\CurrentControlSet\Services\<adapter name>\ Parameters\Tcpip | |
Value Name: | SubnetMask | |
Data Type: | REG_MULTI_SZ | |
Value: | any valid list of IP addresses |
Windows NT uses this value when it applies the subnet mask to a particular IP interface bound to an adapter.
I-337 To enable the DHCP client service on a remote system, you can use the Select Computer option in Regedt32.exe to remotely change this registry entry. It tells Windows NT to configure the first IP interface on the machine using DHCP.
Hive: | HKEY_LOCAL_MACHINE |
Key: | System\CurrentControlSet\Services\<adapter name>\ Parameters\Tcpip |
Value Name: | EnableDhcp |
Data Type: | REG_DWORD |
Value: | 1 |
You need to restart the client for these changes to take effect.
I-338 Ever since you installed DHCP, your network traffic has gone up. This registry parameter helps reduce network broadcast traffic.
Hive: | HKEY_LOCAL_MACHINE |
Key: | System\CurrentControlSet\Services\DhcpServer\Parameters |
Add the following value under the Parameters key:
Value Name: | IgnoreBroadcastFlag |
Data Type: | REG_DWORD |
Value: | 0 |
This registry modification works only on homogenous Ethernet networks or same-subnet Token-Ring networks. If your network has a router that translates MAC-level addresses, do not modify this registry entry.
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