Unified Wired and Wireless Access System Components
D-Link Unified Wired and Wireless Access System
Oct. 2015 Page 443
D-Link UWS User Manual
Discovery and Peer Switches
When multiple peer switches are present in the network, you can control which switch or switches are allowed
to discover a particular AP by the discovery method you use.
If you want to make sure that an AP is discovered by one specific switch, use one of the following methods:
• Disable L2 Discovery on all switches and configure the IP address of the AP in only one DWS-4000 Series
switch.
• Configure the IP address of one DWS-4000 Series switch in the AP.
• Configure the DHCP option 43 with the IP address of only one DWS-4000 Series switch.
An alternative approach is to configure the RADIUS server to return a switch IP address during AP MAC address
checking in the AP authentication process. If the RADIUS server indicates that the AP is a valid managed AP and
returns an IP address of a switch that is not the same as this switch, then the switch sends a re-link message
to the access point with the IP address of the wireless switch to which the AP should be talking to. When the
AP gets the re-link message it modifies or sets the wireless switch IP address, breaks the TCP connection with
the current switch and starts a new discovery process.
You can configure the DWS-4000 Series switch so that each AP is allowed to be managed by any switch in a
cluster. If the DWS-4000 Series switch that manages an AP goes down, one of the backup switches takes over
the management responsibilities.
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