Cisco WIRELESS LAN CONTROLLER OL-17037-01 User Manual download pdf (Page 3)

7-3

Cisco Wireless LAN Controller Configuration Guide

OL-17037-01

Chapter 7 Controlling Lightweight Access Points

Access Point Communication Protocols

with one discovery type (CAPWAP or LWAPP) exceeds the maximum discovery count and the access

point does not receive a discovery response, the discovery type changes to the other type. For example,

if the access point does not discover the controller in LWAPP, it starts the discovery process in CAPWAP.

Note If an access point is in the UP state and its IP address changes, the access point tears down the existing

CAPWAP tunnel and rejoins the controller. In previous software releases, the access point notifies the

controller, and the session continues with the changed IP address without tearing down the session.

Note You must install software release 4.0.155.0 or later on the controller before connecting 1100 and 1300

series access points to the controller. The 1120 and 1310 access points were not supported prior to

software release 4.0.155.0.

Note During the discovery process, the 1140 series access point will only query for Cisco CAPWAP

Controllers. It will not query for LWAPP controllers. If you want this access point to query for both

LWAPP and CAPWAP controllers then you need to update the DNS.

Note The Cisco controllers cannot edit or query any access point information using the CLI if the name of the

access point contains a space.

Note Make sure that the controller is set to the current time. If the controller is set to a time that has already

occurred, the access point might not join the controller because its certificate may not be valid for that

time.

Access points must be discovered by a controller before they can become an active part of the network.

The lightweight access points support these controller discovery processes:

• Layer 3 CAPWAP or LWAPP discovery—Can occur on different subnets from the access point

and uses IP addresses and UDP packets rather the MAC addresses used by Layer 2 discovery.

• Over-the-air provisioning (OTAP)—This feature is supported by Cisco 4400 series controllers. If

this feature is enabled on the controller (on the controller General page), all associated access points

transmit wireless CAPWAP or LWAPP neighbor messages, and new access points receive the

controller IP address from these messages. This feature is disabled by default and should remain

disabled when all access points are installed.

Note For more information about OTAP, see

http://www.cisco.com/en/US/products/ps6366/products_tech_note09186a008093d74a.sht

• Locally stored controller IP address discovery—If the access point was previously associated to

a controller, the IP addresses of the primary, secondary, and tertiary controllers are stored in the

access point’s non-volatile memory. This process of storing controller IP addresses on an access

point for later deployment is called priming the access point.

1 2 3 4 ... 80

No comments

Cisco WIRELESS LAN CONTROLLER OL-17037-01 User Manual Page 3