Dell 6.2 Verifying that APs Are Receiving IP Addresses, Using the Aruba Discovery Protocol ADP

Using the Aruba Discovery Protocol (ADP)

ADP is enabled by default on all Dell APs and Dell controllers. To use ADP, all APs and Dell controllers must be connected to the same Layer-2 network. If the devices are on different networks, a Layer-3 compatible discovery mechanism, such as DNS, DHCP, or IGMP forwarding, must be used instead.

With ADP, APs send out periodic multicast and broadcast queries to locate the master controller. You might need to perform additional network configuration, depending on whether the APs are in the same broadcast domain as the controller:

•If the APs are in the same broadcast domain as the master controller, the controller automatically responds to the APs’ queries with its IP address.

•If the APs are not in the same broadcast domain as the master controller, you must enable multicast on the network (ADP multicast queries are sent to the IP multicast group address 239.0.82.11) for the controller to respond to the APs’ queries. You also must make sure that all routers are configured to listen for Internet Group Management Protocol (IGMP) join requests from the controller and can route these multicast packets.

To verify that ADP and IGMP join options are enabled on the controller, use the following CLI command:

(host) #show adp config

ADP Configuration

-----------------

key value

--------

discovery enable igmp-join enable

If ADP or IGMP join options are not enabled, use the following CLI commands:

(host) (config) #adp discovery enable

(host) (config) #adp igmp-join enable

Verifying that APs Are Receiving IP Addresses

Each AP requires a unique IP address on a subnetwork that has connectivity to a controller. Dell recommends using the Dynamic Host Configuration Protocol (DHCP) to provide IP addresses for APs; the DHCP server can be an existing network server or an controller configured as a DHCP server.

You can use an existing DHCP server in the same subnetwork as the AP to provide the AP with its IP information. You can also configure a device in the same subnetwork to act as a relay agent for a DHCP server on a different subnetwork. (Refer to the vendor documentation for the DHCP Server or relay agent for information.)

If an AP is on the same subnetwork as the master controller, you can configure the controller as a DHCP server to assign an IP address to the AP. The controller must be the only DHCP server for this subnetwork.

In the WebUI

1.Navigate to the Configuration > Network > IP > DHCP Server window.

2.Select the Enable DHCP Server checkbox.

3.In the Pool Configuration section, click Add.

4.Enter information about the subnetwork for which IP addresses are to be assigned. Click Done.

5.If there are addresses that should not be assigned in the subnetwork:

a.Click Add in the Excluded Address Range section.

b.Enter the address range in the Add Excluded Address section.

c.Click Done.

6.Click Apply at the bottom of the window.

406 Access Points (APs) Dell PowerConnect W-Series ArubaOS 6.2 User Guide