ip dhcp pool POOL52
network 10.10.52.0 255.255.255.0
domain-name didata.ise
dns-server 10.10.50.11 10.10.50.1
default-router 10.10.52.1
option 43 ascii 10.10.50.100
lease 7
Interface Vlan52
description EmployeeVLAN-52
ip address 10.10.52.1 255.255.255.0
ip helper-address 10.10.50.10
!
In this case above, 10.10.50.10 is the ISE server...