DHCP - All addresses in use

I'm running a small network (120 computers; 10 printers) and have a DHCP
lease scope of about 212 leases. Normally I have no problem adding machines
to the environment, but now any new machines I bring in say they're "unable
to contact your DHCP server."

In the course of troubleshooting, I see in the DHCP server statistics that
all of my addresses are in use, but when I view address leases, I see that
only 107 have been given out.

Any ideas? Thanks for any light you can shed on this.

Hello,

what is you lease duration ?
By default:
-Leases have 4 hours of extra grace period
-Cleanup is once per hours except if free lease are starvin:

http://lordoftheping.blogspot.com/20...-expected.html



--
Cordialement,
Mathieu CHATEAU
http://lordoftheping.blogspot.com


"Ollapodrida" <(E-Mail Removed)> wrote in message
news:68C82675-FB91-4CC0-B885-(E-Mail Removed)...
> I'm running a small network (120 computers; 10 printers) and have a DHCP
> lease scope of about 212 leases. Normally I have no problem adding
> machines
> to the environment, but now any new machines I bring in say they're
> "unable
> to contact your DHCP server."
>
> In the course of troubleshooting, I see in the DHCP server statistics that
> all of my addresses are in use, but when I view address leases, I see that
> only 107 have been given out.
>
> Any ideas? Thanks for any light you can shed on this.

It's currently set to 8 days, though I'll probably knock it down to two.

"Mathieu CHATEAU" wrote:

> Hello,
>
> what is you lease duration ?
> By default:
> -Leases have 4 hours of extra grace period
> -Cleanup is once per hours except if free lease are starvin:
>
> http://lordoftheping.blogspot.com/20...-expected.html
>
>
>
> --
> Cordialement,
> Mathieu CHATEAU
> http://lordoftheping.blogspot.com
>
>
> "Ollapodrida" <(E-Mail Removed)> wrote in message
> news:68C82675-FB91-4CC0-B885-(E-Mail Removed)...
> > I'm running a small network (120 computers; 10 printers) and have a DHCP
> > lease scope of about 212 leases. Normally I have no problem adding
> > machines
> > to the environment, but now any new machines I bring in say they're
> > "unable
> > to contact your DHCP server."
> >
> > In the course of troubleshooting, I see in the DHCP server statistics that
> > all of my addresses are in use, but when I view address leases, I see that
> > only 107 have been given out.
> >
> > Any ideas? Thanks for any light you can shed on this.
>
>

Do you have many laptop coming from outside ?
If you only have 130 node (station & printer) you should be around 50%, not
full.


--
Cordialement,
Mathieu CHATEAU
http://lordoftheping.blogspot.com


"Ollapodrida" <(E-Mail Removed)> wrote in message
news:45ACF104-5E7E-41B7-95A3-(E-Mail Removed)...
> It's currently set to 8 days, though I'll probably knock it down to two.
>
> "Mathieu CHATEAU" wrote:
>
>> Hello,
>>
>> what is you lease duration ?
>> By default:
>> -Leases have 4 hours of extra grace period
>> -Cleanup is once per hours except if free lease are starvin:
>>
>> http://lordoftheping.blogspot.com/20...-expected.html
>>
>>
>>
>> --
>> Cordialement,
>> Mathieu CHATEAU
>> http://lordoftheping.blogspot.com
>>
>>
>> "Ollapodrida" <(E-Mail Removed)> wrote in message
>> news:68C82675-FB91-4CC0-B885-(E-Mail Removed)...
>> > I'm running a small network (120 computers; 10 printers) and have a
>> > DHCP
>> > lease scope of about 212 leases. Normally I have no problem adding
>> > machines
>> > to the environment, but now any new machines I bring in say they're
>> > "unable
>> > to contact your DHCP server."
>> >
>> > In the course of troubleshooting, I see in the DHCP server statistics
>> > that
>> > all of my addresses are in use, but when I view address leases, I see
>> > that
>> > only 107 have been given out.
>> >
>> > Any ideas? Thanks for any light you can shed on this.
>>
>>

hi,
do you have any rezervation,exclusion list? what net mask do you have set on
DHCP server nic and on scope?
--
Dragos CAMARA
MCSA Windows 2003 server


"Ollapodrida" wrote:

> I'm running a small network (120 computers; 10 printers) and have a DHCP
> lease scope of about 212 leases. Normally I have no problem adding machines
> to the environment, but now any new machines I bring in say they're "unable
> to contact your DHCP server."
>
> In the course of troubleshooting, I see in the DHCP server statistics that
> all of my addresses are in use, but when I view address leases, I see that
> only 107 have been given out.
>
> Any ideas? Thanks for any light you can shed on this.

We have an unsecured wireless laptop cart in our building, which makes me
think that the IPs have been grabbed by unauthorized laptops. Do you know if
there's a way to view connections to all 212 leases?

"Mathieu CHATEAU" wrote:

> Do you have many laptop coming from outside ?
> If you only have 130 node (station & printer) you should be around 50%, not
> full.
>
>
> --
> Cordialement,
> Mathieu CHATEAU
> http://lordoftheping.blogspot.com
>
>
> "Ollapodrida" <(E-Mail Removed)> wrote in message
> news:45ACF104-5E7E-41B7-95A3-(E-Mail Removed)...
> > It's currently set to 8 days, though I'll probably knock it down to two.
> >
> > "Mathieu CHATEAU" wrote:
> >
> >> Hello,
> >>
> >> what is you lease duration ?
> >> By default:
> >> -Leases have 4 hours of extra grace period
> >> -Cleanup is once per hours except if free lease are starvin:
> >>
> >> http://lordoftheping.blogspot.com/20...-expected.html
> >>
> >>
> >>
> >> --
> >> Cordialement,
> >> Mathieu CHATEAU
> >> http://lordoftheping.blogspot.com
> >>
> >>
> >> "Ollapodrida" <(E-Mail Removed)> wrote in message
> >> news:68C82675-FB91-4CC0-B885-(E-Mail Removed)...
> >> > I'm running a small network (120 computers; 10 printers) and have a
> >> > DHCP
> >> > lease scope of about 212 leases. Normally I have no problem adding
> >> > machines
> >> > to the environment, but now any new machines I bring in say they're
> >> > "unable
> >> > to contact your DHCP server."
> >> >
> >> > In the course of troubleshooting, I see in the DHCP server statistics
> >> > that
> >> > all of my addresses are in use, but when I view address leases, I see
> >> > that
> >> > only 107 have been given out.
> >> >
> >> > Any ideas? Thanks for any light you can shed on this.
> >>
> >>
>
>

Hi, Dragos,

No reservations, but I do exclude the first 30 IPs and the last dozen or so
for printers, servers, switches, etc. The mask for the nic and scope are
255.255.255.0.


"Dragos CAMARA" wrote:

> hi,
> do you have any rezervation,exclusion list? what net mask do you have set on
> DHCP server nic and on scope?
> --
> Dragos CAMARA
> MCSA Windows 2003 server
>
>
> "Ollapodrida" wrote:
>
> > I'm running a small network (120 computers; 10 printers) and have a DHCP
> > lease scope of about 212 leases. Normally I have no problem adding machines
> > to the environment, but now any new machines I bring in say they're "unable
> > to contact your DHCP server."
> >
> > In the course of troubleshooting, I see in the DHCP server statistics that
> > all of my addresses are in use, but when I view address leases, I see that
> > only 107 have been given out.
> >
> > Any ideas? Thanks for any light you can shed on this.

Hello,

from the DHCP management console,
in the Address leases menu

You can find the manufacturer from the mac address:
http://coffer.com/mac_find/


--
Cordialement,
Mathieu CHATEAU
http://lordoftheping.blogspot.com


"Ollapodrida" <(E-Mail Removed)> wrote in message
news:72D346E8-C3CC-4502-965C-(E-Mail Removed)...
> We have an unsecured wireless laptop cart in our building, which makes me
> think that the IPs have been grabbed by unauthorized laptops. Do you know
> if
> there's a way to view connections to all 212 leases?
>
> "Mathieu CHATEAU" wrote:
>
>> Do you have many laptop coming from outside ?
>> If you only have 130 node (station & printer) you should be around 50%,
>> not
>> full.
>>
>>
>> --
>> Cordialement,
>> Mathieu CHATEAU
>> http://lordoftheping.blogspot.com
>>
>>
>> "Ollapodrida" <(E-Mail Removed)> wrote in message
>> news:45ACF104-5E7E-41B7-95A3-(E-Mail Removed)...
>> > It's currently set to 8 days, though I'll probably knock it down to
>> > two.
>> >
>> > "Mathieu CHATEAU" wrote:
>> >
>> >> Hello,
>> >>
>> >> what is you lease duration ?
>> >> By default:
>> >> -Leases have 4 hours of extra grace period
>> >> -Cleanup is once per hours except if free lease are starvin:
>> >>
>> >> http://lordoftheping.blogspot.com/20...-expected.html
>> >>
>> >>
>> >>
>> >> --
>> >> Cordialement,
>> >> Mathieu CHATEAU
>> >> http://lordoftheping.blogspot.com
>> >>
>> >>
>> >> "Ollapodrida" <(E-Mail Removed)> wrote in message
>> >> news:68C82675-FB91-4CC0-B885-(E-Mail Removed)...
>> >> > I'm running a small network (120 computers; 10 printers) and have a
>> >> > DHCP
>> >> > lease scope of about 212 leases. Normally I have no problem adding
>> >> > machines
>> >> > to the environment, but now any new machines I bring in say they're
>> >> > "unable
>> >> > to contact your DHCP server."
>> >> >
>> >> > In the course of troubleshooting, I see in the DHCP server
>> >> > statistics
>> >> > that
>> >> > all of my addresses are in use, but when I view address leases, I
>> >> > see
>> >> > that
>> >> > only 107 have been given out.
>> >> >
>> >> > Any ideas? Thanks for any light you can shed on this.
>> >>
>> >>
>>
>>