Figure 34. L3 Discovery Example 2; Figure 35. Dhcp Option Example - D-Link DWS-3024 User Manual

Example 3: IP Address of Switch Configured in the AP
In this example, the administrator connects to the access point CLI and statically configures
the IP addresses of two D-Link Unified Switches that are allowed to manage the AP.

Figure 34. L3 Discovery Example 2

Unified Switch IP List
192.168.3.1.54
192.168.22.161
The AP sends a UDP discovery message to the first IP address configured in its list. When the
switch receives the message, it verifies that the vendor ID on the AP is valid, there is no
existing SSL TCP connection to the access point, and the maximum number of managed APs
hasn't been reached. If all these conditions are met then the switch sends an invitation message
to the AP to start the SSL TCP connection.
If the AP does not receive an invitation from the first Unified Switch configured in its list, it
sends a UDP discovery message to the second Unified Switch configured in the list five
seconds after sending the message to the first Unified Switch.
When an IP address of a Unified Switch is configured on the AP, the AP only associates with
that switch even if other switches discover the AP by using other mechanisms.
For more information about how to configure this discovery method, see
IP Address in the D-Link Access Point"
Example 4: DHCP Option
In this example, the administrator has configured the IP address of the Unified Switch as an
option in the DHCP response to the DHCP request that the AP sends the DHCP server.

Figure 35. DHCP Option Example

AP
4 Installing the D-Link Unified Access System
UDP Discovery
Message
AP
on page 71.
DHCP Request
DHCP Response
DHCP Server
Discovering Access Points and Peer Switches
Unified Switch 1
IP: 192.168.1.54
Unified Switch 2
IP: 192.168.22.161
"Setting the Switch
63