Aruba Networks AirOS v2.3, User Manual

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Deploying Access Points 3
Chapter 1
DNS Server
Configuration Aruba APs are factory configured with
aruba-master
as the
DNS host name. A DNS server on the network can be
configured with an entry for
aruba-master
with the master
Aruba WLAN switch/loopback IP address as the resolution.
To configure this option see
“DNS Server-derived AP
Provisioning ” .
DHCP Server
Configuration A DHCP server on the same subnet as the AP can be configured
to not only provide the AP its own IP address, but also provide
the IP address of a master Aruba WLAN switch to which the AP
should attach. This is achieved by configuring the DHCP
standard vendor specific option (attribute 43) in the DHCP
server, with the desired master Aruba WLAN switch/loopback
IP address. When the DHCP server returns its offer to the AP,
this attribute will be returned with it.
To configure this option see
“DHCP Server-derived AP
Provisioning ” .
Aruba Discovery
Protocol (ADP) - Plug
and Play Aruba APs are factory configured with ADP, a feature that
allows plug and play provisioning for APs connected via Layer
2/3 to a master Aruba WLAN switch on an ADP-enabled
network.
ADP equipped APs send out periodic multicast and broadcast
queries to locate a master Aruba WLAN switch. If an Aruba
switch is present in the same broadcast domain as the APs, it will
respond with the switch/loopback IP address of the master
switch.
If the APs and Aruba switch reside in different broadcast
domains, the APs can discover the Aruba master switch using IP
multicast (IP multicast must be enabled in the network for this to
function). The ADP multicast queries are sent to the IP
multicast group address 224.0.82.11.
Alternatively, you can configure a master Aruba WLAN switch
address as the IP Helper/relay address on any Layer-3 switch on
the same broadcast domain as the APs, thus mitigating the need
to enable multicast in the network.
ADP also functions for APs connected directly to Ethernet ports
on a master Aruba WLAN switch. To configure this option see
“Aruba Discovery Protocol (ADP)” .