How to clear DHCP? If can't, suggestion!

Discussion in 'Broadband Hardware' started by Matthew Weyer, Sep 10, 2004.

  1. Hello everyone,

    I was just wondering if there's an easy way to clear the DHCP client list so I
    can assign different IP addresses to old devices (MAC addresses). If it's not
    possible except by resetting the device back to factory default settings then I
    have a suggestion, let us reset the DHCP server easily. Thanks!
    Matthew Weyer, Sep 10, 2004
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  2. Matthew Weyer

    Kerry Liles Guest

    If you are using DHCP you shouldn't care what IP address is assigned to a
    PC. DHCP servers tend to give out the same IP address based on the MAC
    address (assuming the same IP address is still available) for a reason -
    probably to accommodate people who mistakenly use the IP address to get to
    the box; eg: etc. rather than using other ways to
    identify the target - or to avoid breaking any drive mappings etc.

    Anyway, if you *need* to know the IP address of a box behind a router, then
    define the DHCP range differently to exclude some handfull of addresses and
    assign the boxes a static IP in the unassigned range. That is why one can
    define the scope of the addresses that are handed out by DHCP.

    Kerry Liles, Sep 10, 2004
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  3. Thanks Kerry! Actually the only reason I want to clear the DHCP client list is
    because I have a lot of people connect to my network over time and have so many
    addresses on there that it's hard to tell what's what.
    Matthew Weyer, Sep 10, 2004
  4. Matthew Weyer

    Kerry Liles Guest

    I can see that could be a hassle... Not sure MS is even accepting
    suggestions anymore for their now-defunct product line (as if they ever were
    accepting suggestions!). I did not mean to belittle your suggestion (now I
    realize I may have given that impression after I read my own reply!! - oops,
    sorry). An option to "restart" the DHCP server code would be something that
    would be nice (sure beats resetting from factory and then restoring your
    saved settings).

    Are you sure that a power off/on recycle doesn't clear the DHCP table? I
    must admit I have never looked, but I would imagine it strange that the
    router would save that info in non-volatile ram... but then again...


    Kerry Liles, Sep 10, 2004
  5. Matthew Weyer

    joker Guest

    The easiest way to to do a soft reset by unplugging the power & plugging
    it back in. It's much easier then a factory restore as you only lose
    the basestation log, time, DHCP client list, etc.
    joker, Sep 10, 2004
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