Question : DHCP Bad_address on reservation

Hi,

I am having a problem which is becoming more and more annoying.

I am using a win2k server with win xp client. for most of the machines I am using DHCP reservations. for the rest a simple dhcp lease. the DHCP reservations are in a different IP range than the scope dhcp.

now the problem that I encounter is that some of the reservations change to 'bad addresses' after some time. and it becomes more and more frequent. at that stage the client cannot obtain IP from the server (however if I remove the reservation, it has no problems with getting an IP lease). at the same time I cannot find any computer which would have a conflicting IP address.

do you have any ideas what that be? and how can it be fixed

thank you in advance

Marek

Answer : DHCP Bad_address on reservation

I think the problem is that the IP reservations are out of the scope and when the clients try to renew the dhcp lease this is when you are having the problem seeing bad address. Have you tried setting up a reservation from the pool that makes up your DHCP scope? Can you create a DHCP scope that encompasses the range that this is happening on? Either of these will serve to fix the problem permanently.

(when the lease expires your dhcp server is trying to give the system an available IP out of its IP range in the scope, but the system is requesting an IP that is not in its scope, therefore, bad address)