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Unied Access Point Administrator’s Guide
Unied Access Point Administrator’s Guide
Page 61
March 2012
Section 4 - Managing the Access Point
Field Description
Load Balancing Enable or disable load balancing:
To enable load balancing on this AP, click Enable.
To disable load balancing on this AP, click Disable.
Utilization for No
New Associations
Provide the percentage of network bandwidth utilization allowed on the radio before the AP
stops accepting new client associations.
The default is 0, which means that all new associations will be allowed regardless of the
utilization rate.
Table 32 - Load Balancing
Note: After you congure the load balancing settings, you must click Apply to apply the changes
and to save the settings. Changing some settings might cause the AP to stop and restart system
processes. If this happens, wireless clients will temporarily lose connectivity. We recommend that
you change AP settings when WLAN trafc is low.
Managed Access Point Overview
The UAP can operate in two modes: Standalone Mode or Managed Mode. In Standalone Mode, the UAP acts as
an individual AP in the network, and you manage it by using the Administrator Web User Interface (UI), CLI, or SNMP.
In Managed Mode, the UAP is part of the D-Link Unied Wired and Wireless System, and you manage it by using
the D-Link Unied Wireless Switch. If an AP is in Managed Mode, the Administrator Web UI, Telnet, SSH, and SNMP
services are disabled.
On the UAP, you can congure the IP addresses of up to four D-Link Unied Wireless Switches that can manage it. In
order to manage the AP, the switch and AP must discover each other. There are multiple ways for a switch to discover
an AP. Adding the IP address of the switch to the AP while it is in Standalone Mode is one way to enable switch-to-AP
discovery.
Transitioning Between Modes
Every 30 seconds, the D-Link Unied Wireless Switch sends a keepalive message to all of the access points it
manages. Each AP checks for the keepalive messages on the SSL TCP connection. As long as the AP maintains
communication with the switch through the keepalive messages, it remains in Managed Mode.
If the AP does not receive a message within 45 seconds of the last keepalive message, the AP assumes the switch
has failed and terminates its TCP connection to the switch, and the AP enters Standalone Mode.
Once the AP transitions to Standalone Mode, it continues to forward trafc without any loss. The AP uses the
conguration on the VAPs congured in VLAN Forwarding mode (the standard, non-tunneled mode).
While the AP is in Standalone Mode, you can manage it by using the Web interface or the CLI (through Telnet or
SSH).
For any clients that are connected to the AP through tunneled VAPs, the AP sends disassociate messages and
disables the tunneled VAPs.
As long as the Managed AP Administrative Mode is set to Enabled, the AP starts discovery procedures. If the AP
establishes a connection with a wireless switch, which may or may not be the same switch it was connected to
before, the switch sends the AP its conguration and the AP sends the wireless switch information about all currently
associated clients.
After the conguration from the switch is applied, the AP radio(s) restart. Client trafc is briey interrupted until the
radio(s) are up and the clients are re-associated.