IPConfig is a command-line tool that displays the current configuration of the installed IP stack on a networked computer using TCP/IP.
Run IPConfig from a command prompt rather than from Windows Explorer to see the resulting display.
IPConfig Syntax
The command-line syntax for IPConfig is as follows:
ipconfig [/?|/all|/release [adapter]|/renew [adapter] |/flushdns|/registerdns|/showclassid adapter |/setclassid adapter [classidtoset]]
adapter Full name or pattern with '*' and '?' to 'match', * matches
any character, ? matches one character.
The default is to display only the IP address, subnet mask and default gateway for each adapter bound to TCP/IP.
For /release and /renew, if no adapter name is specified, then the IP address leases for all adapters bound to TCP/IP will be released or renewed.
For SetClassID, if no class ID is specified, then the ClassID is removed.
IPConfig Switches
Table 31.24 lists the IPConfig command-line switches.
Table 31.24 IPConfig Switches
|
Switch
|
Effect
|
|---|
|
/all
|
Produces a detailed configuration report for all interfaces.
|
|
/release <
adapter
>
|
Releases the IP address for a specified adapter. If no adapter name is specified, releases the DHCP leases for all adapters bound to TCP/IP.
|
|
/renew <
adapter
>
|
Renews the IP address for the specified adapter. If no adapter name is specified, renews the DHCP leases for all adapters bound to TCP/IP.
|
|
/flushdns
|
Removes all entries from the DNS Resolver Cache.
|
|
/registerdns
|
Refreshes all DHCP leases and reregisters DNS names.
|
|
/displaydns
|
Displays the contents of the DNS Resolver Cache.
|
|
/showclassid
adapter
|
Displays all the DHCP class IDs allowed for the specified adapter.
|
|
/setclassid
adapter
|
Modifies the DHCP class ID for the specified adapter.
|
|
/?
|
Displays this list.
|
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Caution
It is recommended that only a network administrator or support personnel use many of the advanced features of IPConfig. Using these commands incorrectly can cause problems with the client system's connection to the server.
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Run IPConfig to check the status of a computer's TCP/IP configuration. When used with the
/all
switch, it displays a detailed configuration report for all interfaces, including any configured WAN miniports (typically used for remote access or virtual private network [VPN] connections). The following is a sample report:
Windows 2000 IP Configuration
Host Name . . . . . . . . . . . . : TESTPC1
Primary Domain Name . . . . . . . : reskit.com
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : ntcorpdc1.reskit.com
dns.reskit.com
reskit.com
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . : dns.reskit.com
Description . . . . . . . . . . . : Acme XL 10/100Mb Ethernet NIC
Physical Address. . . . . . . . . : 00-CC-44-79-C3-AA
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 172.16.245.111
Subnet Mask . . . . . . . . . . . : 255.255.248.0
Default Gateway . . . . . . . . . : 172.16.240.1
DHCP Server . . . . . . . . . . . : 172.16.248.8
DNS Servers . . . . . . . . . . . : 172.16.55.85
172.16.55.134
172.16.55.54
Primary WINS Server . . . . . . . : 172.16.248.10
Secondary WINS Server . . . . . . : 172.16.248.9
Lease Obtained. . . . . . . . . . : Friday, March 05, 1999 2:21:40 PM
Lease Expires . . . . . . . . . . : Sunday, March 07, 1999 2:21:40 PM