D-Link DWS-3024 [60/266] Example 3 ip address of switch configured in the ap

D-Link Unified Access System Software User Manual

02/15/2011

Page 60 Document 34CS3000-SWUM104-D10

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

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 “Setting the Switch IP Address in the D-Link Access

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.

Figure 35: DHCP Option Example

The AP can learn up to four Unified Switch IP addresses or DNS names through DHCP option 43 in the DHCP response.

Unified Switch 1

IP: 192.168.1.54

Unified Switch 2

IP: 192.168.22.161

Unified Switch IP List

192.168.3.1.54

192.168.22.161

UDP Discov

ssage

(5 Seconds Later)

UDP Discovery

Message

DHCP Server

DHCP Request

DHCP Response