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DHCP adress avaliable is 0

DHCP address available= 0%. I can't increase the range. As a result any new pc can't get IP. My DHCP lease reserve the IP address for 2 days. But I am pretty sure I can get some free IP if I can detect which are not connected in Network at the moment. How can I find in DHCP "Address Leases" which are connected & which are not. I don’t have time to ping to test. Is there any quick way to find who are not connected, if I can detect then I will delete them to increase DHCP availability. Thanks in Advance.
DHCPMicrosoft Legacy OSMicrosoft Server OS

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Silense

8/22/2022 - Mon
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mccarl

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Silense

ASKER
It's too diffifult to ping each & every Lease IP Address. Even If I change lease expire day from 2 day to 1 day now then it's not gonna Increase my address lease avaliablity right now. Is there any other way to increase DHCP avaliablity without changing IP address range as I have no room to increase range.
mccarl

Not that I know of.
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Phiwi Moyo

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andrew1812

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Silense

ASKER
In scope range 1-254 all are in use. I can't increase this scope list for ex: 192.168.10.1-192.168.10.254 unless I create new subnet or subnet mask. But we do have latest cisco router but I am not sure how to use vlan to increase or how to create new subnet to increase DHCP scope range.
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Phiwi Moyo

So your DHCP is handled by a router now a Server?
Silense

ASKER
It's handle by DHCP server but router and network need to support to provide IP range.
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Otto_N

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Silense

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Would I be able to create 2/3 scope? Currently scope range is from 150-254. There would be any problem if I create another few scope like: 10-100 and 110-140? Thanks.
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Silense

ASKER
Thanks to all.