Figure 34: L3 Discovery Example 2; Figure 35: Dhcp Option Example - D-Link DWS-3000 Series User Manual

D-Link Unified Access System
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.
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
Point" on page 68.
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.
The AP can learn up to four Unified Switch IP addresses or DNS names through DHCP option 43 in the DHCP response.
Page 60

Figure 34: L3 Discovery Example 2

Unified Switch IP List
192.168.3.1.54
192.168.22.161
AP

Figure 35: DHCP Option Example

DHCP Request
DHCP Response
AP
UDP Discovery
Message
"Setting the Switch IP Address in the D-Link Access
DHCP Server
Document 34CS3000-SWUM104-D10
Software User Manual
02/15/2011
Unified Switch 1
IP: 192.168.1.54
Unified Switch 2
IP: 192.168.22.161