Policy Enforcement Manager™ (PEM) obtains DHCP lease information from the
DHCP servers, to create new PEM™ sessions. There is support for both IPv4 and
IPv6. When data packets arrive at BIG-IP® system, PEM also uses DHCP lease
query to obtain IP lease information and re-create the PEM sessions.
Note: If BIG-IP system goes through a
reboot, all PEM sessions, and related lease and subscriber information are lost.
Configuring DHCP lease query in subscriber
To configure the DHCP lease query,
you must first create a listener for DHCPv4 discovery virtual. You can do that by going
You can enable the DHCP lease query
in BIG-IP® system in the Subscriber Management profiles screen.
On the Main tab, click
The Subscriber Management screen opens.
The New Subscriber Management Profile screen opens.
In the Name field, type a unique name for the subscriber
At the right of the Settings area, select the Custom
check box, and then select Enabled from the
DHCP Lease Query list to obtain DHCP Lease
From the DHCP Virtual Server Name list, select the DHCP
virtual server that you created.
This enables the DHCP Lease Query for the subscriber management profile
On the Main tab, click
The Date Plane Listeners screen opens.
Click Add Group.
The New Virtual Group screen opens.
In the Name field, type a unique name for the listener.
In the Destination Address field, type the IP address of the
virtual server. For example, 10.0.0.1 or
Note: When you use an IPv4
address without specifying a prefix, the BIG-IP® system
automatically uses a /32 prefix.
Tip: You can use a catch-all
virtual server (0.0.0.0) to specify all traffic that is delivered
to the BIG-IP® system. Configure the source and destination
setting, during forwarding mode only. In the relay mode, the client does not have an IP
address and the DHCP provides the client with an IP address.
The system will create a virtual server using the address or network you
For the Service Port setting, type or select the service port
for the virtual server.
From the VLAN and Tunnel Traffic list, select Enabled
on. Then, for the VLANs and Tunnels setting, move the
VLAN or VLANs on which you want to allow the virtual servers to share traffic from the
Available list to the Selected list.
For the VLANs and Tunnels setting, move the VLANs and tunnels
that you want to monitor for RADIUS traffic from the Available list
to the Selected list.
From the Subscriber Management Profile list, select the
subscriber management profile that you created.
The Policy Enforcement Manager creates a listener.
You have now configured DHCP Lease
Query in the Policy Enforcement Manager™.