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Troubleshooting virtual machine TCP/IP issues by pinging the loopback address

Symptoms

This article provides steps to troubleshoot network connection issues by pinging the loopback address (127.0.0.1).

Resolution

To use ping to verify that TCP/IP is working correctly, run the command:

ping 127.0.0.1

The output for a working connection appears similar to:

Pinging 127.0.0.1 with 32 bytes of data:

Reply from 127.0.0.1: bytes=32 time<1ms TTL=128

Reply from 127.0.0.1: bytes=32 time<1ms TTL=128

Reply from 127.0.0.1: bytes=32 time<1ms TTL=128

Reply from 127.0.0.1: bytes=32 time<1ms TTL=128

Ping statistics for 127.0.0.1:

Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

Approximate round trip times in milli-seconds:

Minimum = 0ms, Maximum = 0ms, Average = 0ms

If the you receive an error, TCP/IP is not working correctly.

To resolve this issue, try the following options:

Ensure that the loopback interface is installed and configured correctly. For more information, see Installing and configuring the Loopback adapter in a virtual machine (1004779).

or
Reinstall TCP/IP. For more information, see the Microsoft article http://support.microsoft.com/kb/299357.

Note: The preceding link was correct as of January 19, 2010. If you find the link is broken, please provide feedback and a VMware employee will update the link.

Additional Information

For more information, see the main article in this series, Troubleshooting virtual machine TCP/IP connection issues (1007842).

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