Static IP addresses not releasing

[busster]

I use my Lenovo twist for work. From time to time I have to assign a static IP address to my network card based on the customer premise. What I have found is that if I do a ipconfig from the command line, these static ip addresses are not released.

If I assign ip1, then customer site2 ip2, customer site3 ip3, all three ip addresses will show up doing an ipconfig from the command line. Change to dhcp, ip address is assigned, but the statics are still there. Found this issue when I went to a customer site, plugged in, and got an ip conflict message. When I did an ipconfig from the command line, the network card had 5 old static ip addresses and one dhcp assigned ip address.

If I change the network card to use dhcp, it will get in ip address. If I go to another site and connect to another dhcp server, it gets a new ip address. Doing a ipconfig, the dhcp assigned ip addresses are releasing as expected you only see the newly assigned ip address, but you continue to see any staticly assigned ip addresses also listed.

The only way I have been able to resolve the issue is to remove the device(s) and reboot, otherwise, any ip address statically assigned remains assigned to the network card
Upon reboot, both devices are back to dhcp and normal.

 

[linney]

Can you use something like this from an Elevated Command Prompt?

Release and Renew an IP address in Windows 7

https://wiki.csuchico.edu/confluence/display/help/Release+and+Renew+an+IP+address+in+Windows+7

 

[busster]

This releases and renews the ip address assigned by dhcp, but the static ip addresses once assigned, persist.

 

[linney]

Keep in mind your static IP address with not change, but only renew."

Read more: How to Reset Static IP Address | eHow.com

http://www.ehow.com/how_6785921_reset-static-ip-address.html#ixzz2Orcu26yx

How to Remove a Static IP Address

http://www.ehow.com/how_6829991_remove-static-ip-address.html

http://www.google.com.au/search?q=r...&ie=&oe=&redir_esc=&ei=MppUUf_zMYKakQW-hoHwDg

 

[busster]

I understand all of the above.

I understand how to use the above procedures.

What I am telling you is that these procedures do not work.

The only ways to get rid of an ip address once statically assigned is to either regedit or remove the network device and reboot.

I have not heard of anyone else having the same issue. This is a Lenovo twist with factory installed Win8.

This does not happen on my Win7 laptop or any other pc I have worked with in the past.

Gateway and DNS entries do not persist, only the static ip address.

 

[linney]

Can Lenovo throw any light on the matter?

Lenovo Support

http://support.lenovo.com/en_US/research/hints-or-tips/detail.page?LegacyDocID=MIGR-76613

If you test with another Windows user rather than the current user does it make any difference?

How to perform a clean boot to troubleshoot a problem in Windows Vista, Windows 7, or Windows 8

http://support.microsoft.com/default.aspx/kb/929135

How to use the System File Checker tool to troubleshoot missing or corrupted system files on Windows Vista or on Windows 7

http://support.microsoft.com/kb/929833

How to analyze the log file entries that the Microsoft Windows Resource Checker (SFC.exe) program generates in Windows Vista

http://support.microsoft.com/kb/928228#appliesto

 

[busster]

Lenovo says that this is a software issue, contact Microsoft.

Clowns to the left of me, jokers to the right, here I am, stuck in the middle with you.