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Cisco Broadband Access Center 3.8 Administrator Guide
OL-27172-01
Chapter 2 Broadband Access Center Architecture
Architecture
LeaseQuery
The LeaseQuery feature allows you to request lease information from the Network Registrar DHCP
servers. In this release, the LeaseQuery feature is being used by Connection Request and Femto
Authorization Service.
The Connection Request performs the LeaseQuery by providing the list of DHCP servers, whereas the
Femto Authorization Service performs the LeaseQuery, using the provisioning group. In case of Femto
Authorization Service, the DPE sends DHCP LeaseQuery messages only to the DHCP servers registered
for the device's provisioning group, which prevents querying all DHCP servers in the network.
Among all responses, the response from the server that last communicated with the devices, is taken as
the authoritative answer.
In earlier Cisco BAC versions, the LeaseQuery feature relied on the operating system to select the source
interface and the source port for sending LeaseQuery requests. In this release, you can configure the
RDU to use a specific interface and source port.
For detailed information on configuring LeaseQuery in this Cisco BAC release, see Configuring Lease
Query, page 17-27.