DHCP Lease expiration questions

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

Hi Mark,

The default expiry time for Server 2000 & 2003 is 4 hours.

More info...
http://support.microsoft.com/kb/261964

Coraleigh Miller


"mkyp" <(E-Mail Removed)> wrote in message
news:225837FB-508C-4914-82AF-(E-Mail Removed)...
> 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
>

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

"Coraleigh Miller" wrote:

> Hi Mark,
>
> The default expiry time for Server 2000 & 2003 is 4 hours.
>
> More info...
> http://support.microsoft.com/kb/261964
>
> Coraleigh Miller
>
>
> "mkyp" <(E-Mail Removed)> wrote in message
> news:225837FB-508C-4914-82AF-(E-Mail Removed)...
> > 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
> >
>
>
>

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/window....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



"mkyp" <(E-Mail Removed)> wrote in message
news:17FB57AC-FC15-49BB-8E79-(E-Mail Removed)...
> 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
>
> "Coraleigh Miller" wrote:
>
>> Hi Mark,
>>
>> The default expiry time for Server 2000 & 2003 is 4 hours.
>>
>> More info...
>> http://support.microsoft.com/kb/261964
>>
>> Coraleigh Miller
>>
>>
>> "mkyp" <(E-Mail Removed)> wrote in message
>> news:225837FB-508C-4914-82AF-(E-Mail Removed)...
>> > 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
>> >
>>
>>
>>

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

mark

"Coraleigh Miller" wrote:

> 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/window....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
>
>
>
> "mkyp" <(E-Mail Removed)> wrote in message
> news:17FB57AC-FC15-49BB-8E79-(E-Mail Removed)...
> > 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
> >
> > "Coraleigh Miller" wrote:
> >
> >> Hi Mark,
> >>
> >> The default expiry time for Server 2000 & 2003 is 4 hours.
> >>
> >> More info...
> >> http://support.microsoft.com/kb/261964
> >>
> >> Coraleigh Miller
> >>
> >>
> >> "mkyp" <(E-Mail Removed)> wrote in message
> >> news:225837FB-508C-4914-82AF-(E-Mail Removed)...
> >> > 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
> >> >
> >>
> >>
> >>
>
>
>