Dhcp server problem leasing with 5820 switch

[sandore]

Hi,

I configured hp 5820 switch with dhcp server pool for every vlan configured on the switch, vlans are layer 3, the problem is that the clients does not acquire ip address until after logging in to their windows desktop. with windows server dhcp this does not happen.

I need the pc to acquire the lease when booting up because I need to install softwares using group policy and this problem prevents connection with active directory on boot.

Thanks