Dell 6.2 Verifying that A Ps Are Rece iving IP Addresses

406| AccessPoints ( APs) DellPowerConnect W- Series ArubaOS 6.2 | User Guide
Using the Aruba Discovery Protocol (ADP)
ADP is enabled by default on all Dell APs and Dell controllers. To use ADP , allA Ps and Dell controllers must be
connected to the same Layer-2 network.If t hedevices are on different networks, a Layer-3 compatible discovery
mechanism,such as D NS, DHCP, or IGMP forwarding, must be used instead.
With ADP, APs send out periodic multicast and broadcast queries to locate the master co ntroller.You might need
to performaddit ionalnetwo rkconfiguration, depending on whether the APs are in the same broadcast domain as the
controller:
lIf the APs are in the same broadcast domain as the master controller,the controller automatically responds to the
APs’ queries with its IP address.
lIf 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
respondt o theAP s’ queries.You also must make surethat all routers are configuredto listen for Internet Group
ManagementProtoc ol(I GMP) join requests fromthe controller and can route these multicast packets.
To verify that ADP and IGMP join optio ns areenabled on the controller, use thefollowing CLI command:
(host) #show adp config
ADP Configuration
-----------------
keyvalue
--------
discoveryenable
igmp-joinenable
If ADP or IGMP join opti ons arenot enabled, use the following CLI commands:
(host) (config) #adp discovery enable
(host) (config) #adp igmp-join enable
Verifying that A Ps Are Rece iving IP Addresses
Each AP requires a uniqueIP address on a subnetworkthat has connectivi ty to a controller.D ellrecommends using
the Dynamic Host Configuration Protocol (DHCP) to provide IP addresses for APs; the DHCP server can bean
existing network servero r an controllerconfigured as a DHCP server.
You can usean existi ngD HCP serverin the same subnetwork as the AP to provide the AP with its IP information.
You can alsoc onfigurea 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 controllermust be the only DHCP server fort his subnetwork.
In the WebUI
1. N avigate to the Configuration > Network > IP > DHCP Server window.
2. Select the Enable DHCP Server checkbox.
3. I n the Pool Configuration section, click Add.
4. E nter information about the subnetwork for which IP addresses are to be assigned. Click Done.
5. I f there areaddresses that should not be ass ignedi n the subnetwork:
a. Click Add in the ExcludedA ddressR angesect ion.
b. Enter the address range in the Add Excluded Address section.
c. Click Done.
6. Click A pplyat t hebot tom of the window.