Software User Manual D-Link UAP
12/10/09
34CSFP6XXUAP-SWUM100-D13 Managed Access Point Overview Page 63
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 Unified Access System, and you manage it by using the D-Link Unified Switch.
If an AP is in Managed Mode, the Administrator Web UI, Telnet, SSH, and SNMP services are disabled.
On the UAP, you can configure the IP addresses of up to four D-Link Unified 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 Unified 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 traffic without any loss. The AP uses the configuration
on the VAPs configured 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, as Figure 16 shows, 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 configuration and the AP sends the wireless switch information about all currently
associated clients.
After the configuration from the switch is applied, the AP radios restart. Client traffic is briefly interrupted until the radios are
up and the clients are re-associated.
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