WLC 2106 CPU ACL Preventing Client from Getting DHCP traffic

[3iadministrator]

Hi,

Here is my portion of ACL List applied on the Controller CPU.

- permit 192.168.1.0/24 0.0.0.0 UDP DHCPServer DHCPCLient Any Outbound

- Permit 0.0.0.0 192.168.1.0/24 UDP

DHCPClient DHCPServer Any Inbound

The DHCP server is connected to a Cisco Switch on different VLAN.

When I enable the CPU ACL. The client couldn't get any IP address.

But when I disable the CPU ACL. the clients have no problem getting the IP Address.

what could be wrong here?many thanks

[jwadleigh]

If your DHCP server is on a different subnet than your clients, then you'll have to set up a helper address so that clients can cross L3 to reach the DHCP server.

Apply the following command to the router interface facing the client:

ip helper-address