DHCP Lease expiration questions

Discussion in 'Windows Networking' started by mkyp, Aug 8, 2007.

  1. mkyp

    mkyp Guest

    When does a DHCP entry get removed from the lease list after a lease expires?

    I have a unit that has been removed from the network and the DHCP admin show
    the lease entry with an "i" (client not registered). How long will this
    entry remain in the list? Will it remain till the DHCP server exhausts its
    pool and this expired lease is all that remains? Or does the DHCP server us
    a time based algorithm?

    thanx, mark
     
    mkyp, Aug 8, 2007
    #1
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  2. Coraleigh Miller, Aug 11, 2007
    #2
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  3. mkyp

    mkyp Guest

    Coraleigh,

    Thanx for you response. That's just what I was looking for.

    I took a look at the DHCP admin tool and I did not see an way to tweak this
    value. Do you know of a way to do this (setting an option?)?

    thanx, mark
     
    mkyp, Aug 14, 2007
    #3
  4. You might instead want to consider reducing your default lease expiration
    time if you have...
    "
    ..A limited number of IP addresses available.
    ..Client configurations that change frequently.
    ..Clients that relocate often; for example, because they connect to
    conference rooms or wireless networks
    "
    http://technet2.microsoft.com/windo...eae9-43a8-9da0-09aff0a71dee1033.mspx?mfr=true

    However if you do want to try to change your dhcp grace period time this is
    the regkey which you would need to add..
    HKLM\System\CurrentControlSet\Services\DHCPServer\Parameters\LeaseExtension

    Value Name: LeaseExtension
    Value Type: DWORD
    Value Data: time in minutes

    Once you have added it you will need to stop and start your DHCP service.

    Hope this helps. :)

    Coraleigh Miller
     
    Coraleigh Miller, Aug 14, 2007
    #4
  5. mkyp

    mkyp Guest

    Thanx again for the quick response, your info was just what I was looking for.

    mark
     
    mkyp, Aug 14, 2007
    #5
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