AP Installation
Chapter 2
8
Aruba AP 70
0510159-02
Installation Guide
September 2006
Locate the Mobility Controller
An Aruba AP can discover the IP address of the Mobility Controller in one of the
following ways:
From a DNS server
From a DHCP server
Using the Aruba Discovery Protocol (ADP)
From a DNS Server
Aruba APs are factory-configured to use the host name
aruba-master
for the
Mobility Controller. For the DNS server to resolve this host name to the IP address
of the Mobility Controller, you must configure an entry on the DNS server for the
name
aruba-master
.
For information on how to configure a host name entry on the DNS server, refer
to the vendor documentation for your server.
N
OTE
:
Aruba recommends using a DNS server to provide APs with the IP
address of the master Mobility Controller because it involves minimal
changes to the network and provides the greatest flexibility in the
placement of APs.
From a DHCP Server
You can configure a DHCP server to provide the Mobility Controller’s IP address.
You need to configure the DHCP server to send the Mobility Controller’s IP
address using the DHCP vendor-specific attribute option 43. Aruba APs identify
themselves with a vendor class identifier set to
ArubaAP
in their DHCP request.
When the DHCP server responds to the request, it will send the controller’s IP
address as the value of option 43.
For more information on how to configure vendor-specific information on a DHCP
server, see the
ArubaOS User Guide
or refer to the vendor documentation for your
server.
Using the Aruba Discovery Protocol (ADP)
ADP is enabled by default on all Aruba APs and Mobility Controllers. To use ADP,
all Aruba APs and Mobility 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
Mobility Controller. You may need to perform additional network configuration,
depending on whether the APs are in the same broadcast domain as the Mobility
Controller:
If the APs are in the same broadcast domain as the Mobility Controller, the
controller automatically responds to the APs’ queries with its IP address.
