How to assign the IP to the VM / vApp from the IP Pool?

Hi ,

I am new to the Vsphere ( v5.5). I have to assign the IP to the VM / vApp from the IP Pool. I have created the IP pool and assigned to the Vapp (with Transient/ Fixed ) but still I did not get the IP from the IP pool.  Shouldn't IP pool behave like a DHCP server in that it automatically assigns IP addresses automatically to the VMs in the Vapp.  Any one could you help me? Below is the overview of what I tried.

1) Create a vApp and move the VM to the vApp

2) Create a new network bridged with vmnic0

3) Create a new vlan 'vlan 10' and configure the new network to use vlan 10

4) Set up IP pool

5) Configure IP allocation policy in vApp - Transient

6) Enable vApp options in VM settings and then finally change the IP allocation policy on the VM.

Thanks,

Vidhya