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E W
Asked: 2010-12-03 11:11:59 +0800 CST

How to find the IP address assigned to an interface that has been removed

  • 772

In Windows (specifically, server 2008 R2), if a network interface dies and I replace it, how can I then retrieve the IP that was assigned to the old interface?

I know Windows retains it somewhere, because if I knew what it was and assigned it to the new interface, Windows would throw a warning and inform me that IP was assigned on this system before.

Along the same lines, if I were talking about a virtual guest that was moved to a new host that did not have the virtual network configured the same, I arrive at the same issue. I need to find the old IP and assign it to the new interface.

Thanks,

[EW]

windows networking windows-server-2008-r2

2 Answers

  1. Best Answer

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces

    via regedit

    • 5

  2. You can use the netsh command to accomplish this:

    netsh interface ipv4 dump

    That should give you manually assigned ipv4 interface information (active, inactive, or even removed interfaces). Replace with ipv6 if you need ipv6 interface information.

    Result:

    # ----------------------------------
# IPv4 Configuration
# ----------------------------------
pushd interface ipv4

reset
set global icmpredirects=enabled
add route prefix=0.0.0.0/0 interface="Local Area Connection 2" nexthop=192.168.28.1 publish=Yes
add route prefix=0.0.0.0/0 interface="Local Area Connection" nexthop=10.10.10.1 publish=Yes
add address name="Local Area Connection 2" address=192.168.28.180
add address name="Local Area Connection" address=10.10.10.212
    • 2