Chapter 7 Management Mode
NWA3000-N Series User’s Guide
104
Note: The NWA3000-N series AP can be a standalone AP (default), a CAPWAP
managed AP, or a CAPWAP AP controller.
7.2.1 CAPWAP Discovery and Management
The link between CAPWAP-enabled access points proceeds as follows:
1
An AP in managed AP mode joins a wired network (receives a dynamic IP
address).
2
The AP sends out a discovery request, looking for an AP in CAPWAP AP controller
mode.
3
If there is an AP controller on the network, it receives the discovery request. If the
AP controller is in
Manual
mode it adds the details of the AP to its
Unmanaged
Access Points
list, and you decide which available APs to manage. If the AP is in
Always Accept
mode, it automatically adds the AP to its
Managed Access
Points
list and provides the managed AP with default configuration information,
as well as securely transmitting the DTLS pre-shared key. The managed AP is
ready for association with wireless clients.
7.2.2 Managed AP Finds the Controller
A managed NWA3000-N series AP can find the controller in one of the following
ways:
• Manually specify the controller’s IP address using the commands. See the
NWA3000-N series AP CLI Reference Guide for details.
• Get the controller’s IP address from a DHCP server with the controller’s IP
address configured as option 138.
• Broadcasting to discover the controller within the broadcast domain.
The AP controller must have a static IP address; it cannot be a DHCP client.
7.2.3 CAPWAP and IP Subnets
By default, CAPWAP works only between devices with IP addresses in the same
subnet (see the appendices for information on IP addresses and subnetting).
However, you can configure CAPWAP to operate between devices with IP
addresses in different subnets by doing the following.
• Activate DHCP. Your network’s DHCP server must support option 138 defined in
RFC 5415.
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