DHCP Scope has free IPs, but not using them

[Guest]

SBS 2000, single server network.
I am constantly getting this in the system log:
Scope, 10.0.0.0, is 100 percent full with only 0 IP addresses remaining.

I have not enlarged the DHCP range, but it is already 90 addresses, and we
only have about 60-70 total devices in the company.

I just changed RAS on the server so that it is using a couple of static
addresses outside the DHCP range, so I am back to only 89% for now, but I
expect it to fill up again.

Why does the DHCP server seem to ignore unused addresses within the DHCP
range? When I look at the current leases, it skips around a lot, for
instance, 10.0.0.151, 154, 155, 158, 160, 166, 171, 172, etc.

There are only 2 reserved addresses within the range.

Can anyone help me out here? Thank you!

 

[Andrei Ungureanu]

you can try to change the address lease to a shorter time period and try to
clear the address leases made by RAS (RAS is requesting ip addresses in
pools of 10 I think)


--
Regards,
Andrei Ungureanu
www.eventid.net
Test our new EventReader!
http://www.altairtech.ca/eventreader/default2.asp?ref=au

 

[Guest]

I've already cleared the RAS leases, but even before I did that, there were
lots of unused addresses in the pool.

 

[Andrei Ungureanu]

if it will fill up again try to see who is using additional ip addresses and
identify the machines by MAC addresses.


--
Regards,
Andrei Ungureanu
www.eventid.net
Test our new EventReader!
http://www.altairtech.ca/eventreader/default2.asp?ref=au

 

[Guest]

After going in and reconciling/verifying the scope, when I look in DHCP,
under leases, I showed the whole range full, but only about half were "real"
leases. The rest just had the IP address for a name, instead of
device.domain.com, and the MAC address is funky, like 31302e302e302e31393100.

The next address would have the same MAC address, but incremented by 100,
and so forth.

I tried deleting about 20 of these from the leases, after verifying that
there was no real device at that address, but the DHCP range still warns as
100% full.

The ones I deleted from the leases have not returned.

As far as I know, everyone is getting an IP address, but there haven't been
any new devices added to the network since I started here, and I'm about to
add 7 new PCs, so I'm concerned.

This is weird. Can anyone shed some light?

Tnank you!

if it will fill up again try to see who is using additional ip addresses and
identify the machines by MAC addresses.


--
Regards,
Andrei Ungureanu
www.eventid.net
Test our new EventReader!
http://www.altairtech.ca/eventreader/default2.asp?ref=au





SBS 2000, single server network.
I am constantly getting this in the system log:
Scope, 10.0.0.0, is 100 percent full with only 0 IP addresses remaining.

I have not enlarged the DHCP range, but it is already 90 addresses, and we
only have about 60-70 total devices in the company.

I just changed RAS on the server so that it is using a couple of static
addresses outside the DHCP range, so I am back to only 89% for now, but I
expect it to fill up again.

Why does the DHCP server seem to ignore unused addresses within the DHCP
range? When I look at the current leases, it skips around a lot, for
instance, 10.0.0.151, 154, 155, 158, 160, 166, 171, 172, etc.