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IP addresses??

By barlow ·
How is it possible that a computer is picking up and IP address when it isn't even plugged into a network and the IP that it is picking up isn't one that is within our range? The system is set to non-static IP.

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by jayeliz In reply to IP addresses??

For Windows 2000, DHCP clients automatically configure an IP address and subnet mask when started if a DHCP server is unavailable. This feature--referred to as IP auto-configuration--can be useful for clients on small private networks, such as a small business office or home network environment. The DHCP client auto-configures its IP address and subnet mask using a selected address from the Microsoft-reserved class B network, 169.254.0.0, with the subnet mask, 255.255.0.0.

Hope this helps

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by sgt_shultz In reply to IP addresses??

depends on the os version.
what ip address is it picking up and how are you determining it.
ipconfig <enter>
if local area network type address like 192.168.x.x or 10.0.x.x, then could be retaining one it got last time it was in contract with dhcp server. if Internet type address like 216.x.x.x then pc is getting ip address from your isp.
is it plugged into internet router? dsl modem? cable modem? those things could be dhcp server

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by barlow In reply to

Thank you for helping. The machine wasn't plugged into anything. We had a 2k server added to our network for a couple of hours and started having random problems with machines not booting and having these off the wall ip numbers. Dissconnected server from network and the machines are still loading very slowly.

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by RCOM In reply to IP addresses??

Use winipcfg and select the nic from the dropdown list. Usually PPP adapters are shown first. Anyway click on release all close and check to see if the address comes back.

For Win2k and XP run the command prompt then type ipconfig use the command to do the same as above.

/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.

/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.

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by rpepper In reply to IP addresses??

the 169 automatic assigning is correct. You will have to go to properties from network neighbor hood and select tcp and deselect the automatic setting. Sometimes this 169.... address will not release

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