Missing DHCP addresses

[Guest]

I currently have a range of addresses setup in DHCP, but I keep running out
of them. If I look at the leases, not all the addresses are showing up and
also if I try to ping the missing addreses that are in the range but don't
show up in leases they can't be pinged??? where are my addresses going?

 

[Lanwench [MVP - Exchange]]

I currently have a range of addresses setup in DHCP, but I keep
running out of them.

How big is your scope of DHCP addresses (not including exclusions)? How many
computers? How long are your leases set for?

If I look at the leases, not all the addresses
are showing up

Is everyone using DHCP, or are some using statics?

and also if I try to ping the missing addreses that
are in the range but don't show up in leases they can't be pinged???

Not sure what you mean by missing addresses.

where are my addresses going?

You don't have any other DHCP servers on your network, do you?

 

[Guest]

scope is 24 addresses
should have at least 10 available since I use static for everyone except
traveling laptop users.
leases are set for one day
no other dhcp servers on network.

what I mean by missing ip's is, statistics show all ip addresses taken up,
but in the leases window not all addresses are there? the other addresses are
unpingable(not a real word, i know)

 

[Guest]

Does anyone have an answer for this?

scope is 24 addresses
should have at least 10 available since I use static for everyone except
traveling laptop users.
leases are set for one day
no other dhcp servers on network.

what I mean by missing ip's is, statistics show all ip addresses taken up,
but in the leases window not all addresses are there? the other addresses are
unpingable(not a real word, i know)

 

[Lanwench [MVP - Exchange]]

Does anyone have an answer for this?

Are you using AD? Do you see these IP addresses in DNS?

 

[Guest]

yes i am running dns and some (3 of them) of those "missing addresses" are in
my reverse lookup zone

 

[Lanwench [MVP - Exchange]]

yes i am running dns and some (3 of them) of those "missing
addresses" are in my reverse lookup zone

What are they assigned to?

 

[Guest]

they are assigned to computers that I guess used to have those addresses, but
the computers now have picked up differnet addreses that now show up in
"leases". Also, some of the computer names I've never seen before
Is there a way to clean DHCP of those addresses? I tried to restart but that
didn't work

 

[Lanwench [MVP - Exchange]]

they are assigned to computers that I guess used to have those
addresses, but the computers now have picked up differnet addreses
that now show up in "leases". Also, some of the computer names I've
never seen before

Do you have any dialin/RAS/VPN users? Laptop users come in sometimes?

Is there a way to clean DHCP of those addresses? I tried to restart
but that didn't work

You can manually remove them.

 

[Guest]

yes i do have vpn users (2 of them) that "take" dhcp but those addresses show
up and also are always released

 

[Guest]

Hi Nelson,

Did you get a solution for this, I have a customer with exactly the same
issue and I'd love to know the answer?