D-Link Marine Radio D-Link Unified Access Point Administrators User Manual

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Unied Access Point Administrator’s Guide
Unied 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 congure 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 trafc 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 Unied Wired and Wireless System, and you manage it by using
the D-Link Unied 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 congure the IP addresses of up to four D-Link Unied 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 Unied 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 trafc without any loss. The AP uses the
conguration on the VAPs congured 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 conguration and the AP sends the wireless switch information about all currently
associated clients.
After the conguration from the switch is applied, the AP radio(s) restart. Client trafc is briey interrupted until the
radio(s) are up and the clients are re-associated.

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