What is the name of Windows command line utility that can be used to display TCP IP configuration settings?

For a Microsoft Windows 2000 version of this article, see 162326.

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More Information
How to Use the TRACERT Utility
How to Use TRACERT to Troubleshoot
How to Use TRACERT Options
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In this article
Additional References
Which Windows command is used to display TCP IP connection and status?
What is the TCP IP command line tool?
What commands you will use to check TCP IP configuration?
Which command line command in MS Windows is used to display the contents of a routing table?

Summary

This article describes TRACERT (Trace Route), a command-line utility that you can use to trace the path that an Internet Protocol (IP) packet takes to its destination.

This article discusses the following topics:

How to Use the TRACERT Utility
How to Use TRACERT to Troubleshoot
How to Use TRACERT Options

More Information

How to Use the TRACERT Utility

The TRACERT diagnostic utility determines the route to a destination by sending Internet Control Message Protocol (ICMP) echo packets to the destination. In these packets, TRACERT uses varying IP Time-To-Live (TTL) values. Because each router along the path is required to decrement the packet's TTL by at least 1 before forwarding the packet, the TTL is effectively a hop counter. When the TTL on a packet reaches zero (0), the router sends an ICMP "Time Exceeded" message back to the source computer.

TRACERT sends the first echo packet with a TTL of 1 and increments the TTL by 1 on each subsequent transmission, until the destination responds or until the maximum TTL is reached. The ICMP "Time Exceeded" messages that intermediate routers send back show the route. Note however that some routers silently drop packets that have expired TTLs, and these packets are invisible to TRACERT.

TRACERT prints out an ordered list of the intermediate routers that return ICMP "Time Exceeded" messages. Using the -d option with the tracert command instructs TRACERT not to perform a DNS lookup on each IP address, so that TRACERT reports the IP address of the near-side interface of the routers.

In the following example of the tracert command and its output, the packet travels through two routers (157.54.48.1 and 11.1.0.67) to get to host 11.1.0.1. In this example, the default gateway is 157.54.48.1 and the IP address of the router on the 11.1.0.0 network is at 11.1.0.67.

The command:

C:\>tracert 11.1.0.1
The output from the command:

Tracing route to 11.1.0.1 over a maximum of 30 hops
---------------------------------------------------
1 2 ms 3 ms 2 ms 157.54.48.1
2 75 ms 83 ms 88 ms 11.1.0.67
3 73 ms 79 ms 93 ms 11.1.0.1

Trace complete.

How to Use TRACERT to Troubleshoot

You can use TRACERT to find out where a packet stopped on the network. In the following example, the default gateway has found that there is no valid path for the host on 22.110.0.1. Probably, either the router has a configuration problem, or the 22.110.0.0 network does not exist, reflecting a bad IP address.

The command:

C:\>tracert 22.110.0.1
The output from the command:

Tracing route to 22.110.0.1 over a maximum of 30 hops
-----------------------------------------------------
1 157.54.48.1 reports: Destination net unreachable.

Trace complete.
TRACERT is useful for troubleshooting large networks where several paths can lead to the same point or where many intermediate components (routers or bridges) are involved.

How to Use TRACERT Options

There are several command-line options that you can use with TRACERT, although the options are not usually necessary for standard troubleshooting.

The following example of command syntax shows all of the possible options:

tracert -d -h maximum_hops -j host-list -w timeout target_hostWhat the parameters do:

-d
Specifies to not resolve addresses to host names

-h maximum_hops
Specifies the maximum number of hops to search for the target

-j host-list
Specifies loose source route along the host-list

-w timeout
Waits the number of milliseconds specified by timeout for each
reply

target_host
Specifies the name or IP address of the target host

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ipconfig

Article
03/03/2021
4 minutes to read

Displays all current TCP/IP network configuration values and refreshes Dynamic Host Configuration Protocol (DHCP) and Domain Name System (DNS) settings. Used without parameters, ipconfig displays Internet Protocol version 4 (IPv4) and IPv6 addresses, subnet mask, and default gateway for all adapters.

Syntax

ipconfig [/allcompartments] [/all] [/renew [<adapter>]] [/release [<adapter>]] [/renew6[<adapter>]] [/release6 [<adapter>]] [/flushdns] [/displaydns] [/registerdns] [/showclassid <adapter>] [/setclassid <adapter> [<classID>]]

Parameters

Parameter	Description
/all	Displays the full TCP/IP configuration for all adapters. Adapters can represent physical interfaces, such as installed network adapters, or logical interfaces, such as dial-up connections.
/displaydns	Displays the contents of the DNS client resolver cache, which includes both entries preloaded from the local Hosts file and any recently obtained resource records for name queries resolved by the computer. The DNS Client service uses this information to resolve frequently queried names quickly, before querying its configured DNS servers.
/flushdns	Flushes and resets the contents of the DNS client resolver cache. During DNS troubleshooting, you can use this procedure to discard negative cache entries from the cache, as well as any other entries that have been added dynamically.
/registerdns	Initiates manual dynamic registration for the DNS names and IP addresses that are configured at a computer. You can use this parameter to troubleshoot a failed DNS name registration or resolve a dynamic update problem between a client and the DNS server without rebooting the client computer. The DNS settings in the advanced properties of the TCP/IP protocol determine which names are registered in DNS.
/release `[<adapter>]`	Sends a DHCPRELEASE message to the DHCP server to release the current DHCP configuration and discard the IP address configuration for either all adapters (if an adapter is not specified) or for a specific adapter if the adapter parameter is included. This parameter disables TCP/IP for adapters configured to obtain an IP address automatically. To specify an adapter name, type the adapter name that appears when you use ipconfig without parameters.
/release6`[<adapter>]`	Sends a DHCPRELEASE message to the DHCPv6 server to release the current DHCP configuration and discard the IPv6 address configuration for either all adapters (if an adapter is not specified) or for a specific adapter if the adapter parameter is included. This parameter disables TCP/IP for adapters configured to obtain an IP address automatically. To specify an adapter name, type the adapter name that appears when you use ipconfig without parameters.
/renew `[<adapter>]`	Renews DHCP configuration for all adapters (if an adapter is not specified) or for a specific adapter if the adapter parameter is included. This parameter is available only on computers with adapters that are configured to obtain an IP address automatically. To specify an adapter name, type the adapter name that appears when you use ipconfig without parameters.
/renew6 `[<adapter>]`	Renews DHCPv6 configuration for all adapters (if an adapter is not specified) or for a specific adapter if the adapter parameter is included. This parameter is available only on computers with adapters that are configured to obtain an IPv6 address automatically. To specify an adapter name, type the adapter name that appears when you use ipconfig without parameters.
/setclassid `<adapter>[<classID>]`	Configures the DHCP class ID for a specified adapter. To set the DHCP class ID for all adapters, use the asterisk (*) wildcard character in place of adapter. This parameter is available only on computers with adapters that are configured to obtain an IP address automatically. If a DHCP class ID is not specified, the current class ID is removed.
/showclassid `<adapter>`	Displays the DHCP class ID for a specified adapter. To see the DHCP class ID for all adapters, use the asterisk (*) wildcard character in place of adapter. This parameter is available only on computers with adapters that are configured to obtain an IP address automatically.
/?	Displays Help at the command prompt.

Remarks

This command is most useful on computers that are configured to obtain an IP address automatically. This enables users to determine which TCP/IP configuration values have been configured by DHCP, Automatic Private IP Addressing (APIPA), or an alternate configuration.
If the name you supply for adapter contains any spaces, use quotation marks around the adapter name (for example, "adapter name").
For adapter names, ipconfig supports the use of the asterisk (*) wildcard character to specify either adapters with names that begin with a specified string or adapters with names that contain a specified string. For example, Local* matches all adapters that start with the string Local and *Con* matches all adapters that contain the string Con.

Examples

To display the basic TCP/IP configuration for all adapters, type:

ipconfig

To display the full TCP/IP configuration for all adapters, type:

ipconfig /all

To renew a DHCP-assigned IP address configuration for only the Local Area Connection adapter, type:

ipconfig /renew Local Area Connection

To flush the DNS resolver cache when troubleshooting DNS name resolution problems, type:

ipconfig /flushdns

To display the DHCP class ID for all adapters with names that start with Local, type:

ipconfig /showclassid Local*

To set the DHCP class ID for the Local Area Connection adapter to TEST, type:

ipconfig /setclassid Local Area Connection TEST

Additional References

Command-Line Syntax Key

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Which Windows command is used to display TCP IP connection and status?

The netstat command generates displays that show network status and protocol statistics. You can display the status of TCP and UDP endpoints in table format, routing table information, and interface information.

What is the TCP IP command line tool?

TCP/IP is part of the underlying structure of your system. It allows you to communicate with another terminal or system merely by executing a command or program. Your system takes care of the rest. Changes Transmission Control Protocol/Internet Protocol (TCP/IP) based name service configuration on a host.

What commands you will use to check TCP IP configuration?

Find Your TCP/IP Properties in Microsoft Windows 10 At the command prompt, type ipconfig /all and press Enter. Note the values that you see for the primary network adapter.

Which command line command in MS Windows is used to display the contents of a routing table?

The -r option of netstat displays the IP routing table. On the command line, type the following command. The first column shows the destination network, the second the router through which packets are forwarded. The U flag indicates that the route is up; the G flag indicates that the route is to a gateway.