In the AMC, navigate to System Configuration > Services.
In the Access Services section, under Network tunnel service area, Configure. The Network Tunnel Service page displays.
In the IP Address Pools section, click the + (New) icon. The IP Address Pool page displays.
In the Name field, type a name for the address pool.
In the Description field, type a descriptive comment about the address pool.
Click Routed address pool - dynamic.
By default the DHCP server field is blank; the appliance sends broadcast requests to locate DHCP servers and uses them to allocate addresses. Leave this box blank unless you need to configure a specific DHCP server.
Click Save. (DHCP address pools ignore the Advanced settings on this AMC page.)