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Working with controlled APs
Discovery of controlled APs
Discovery is performed whenever an AP:
Is restarted (or reset to factory defaults),
Loses connectivity with its service controller,
Is removed and rediscovered using an action on the Controlled APs >> Overview >
Discovered APs page.
Discovery methods
Four discovery methods are available. The following table summaries their features and
recommended applications.
Method Description Supported by Suggested use
UDP
broadcast
AP issues UDP
broadcasts to discover
service controllers on the
same subnet.
Unprovisioned APs Both the service
controller and AP
reside on the same
subnet.
DHCP AP obtains service
controller address from a
specially configured
DHCP server.
Unprovisioned APs The AP is on a different
subnet than the service
controller.
DNS AP obtains service
controller address from a
DNS server using
predefined host names.
Unprovisioned APs
Provisioned APs
The AP is on a different
subnet than the service
controller.
Specific IP
addresses
AP connects to a specific
service controller using a
pre-configured static IP
address.
Provisioned APs DHCP and DNS are not
used and the AP is on a
different subnet than
the service controller.
Note A service controller listens for discovery requests on its LAN port and/or Internet port as
configured on the Service Controller >> Management > Device Discovery page. (See
Device discovery on page 4-8).
UDP broadcast discovery
The AP sends a UDP broadcast to discover all service controllers that are on the same subnet
as the AP.
DHCP discovery
When configured as DHCP client (which is the factory default setting for all APs), an AP can
obtain the IP addresses of service controllers on the network from any DHCP server
configured to support the Colubris Vendor Class (DHCP option 43).
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