Proxim ORiNOCO AP-700 - Manual (Page 49)

Performing Advanced Configuration AP-700 User Guide
Interfaces
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However, there is no guarantee that another radio is not transmitting a packet at the same time, causing a collision. This typically occurs when
there are hidden nodes (clients that can communicate with the Access Point but are out of range of each other) in very large cells.
When RTS/CTS occurs, the sending radio first transmits a Request to Send (RTS) packet to confirm that the medium is clear. When the
receiving radio successfully receives the RTS packet, it transmits back a Clear to Send (CTS) packet to the sending radio. When the sending
radio receives the CTS packet, it sends the data packet to the receiving radio. The RTS and CTS packets contain a reservation time to notify
other radios (including hidden nodes) that the medium is in use for a specified period. This helps to minimize collisions. While RTS/CTS adds
overhead to the radio network, it is particularly useful for large packets that take longer to resend after a collision occurs.
RTS/CTS Medium Reservation is an advanced parameter and supports a range between 0 and 2347 bytes. When set to 2347 (the default
setting), the RTS/CTS mechanism is disabled. When set to 0, the RTS/CTS mechanism is used for all packets. When set to a value between
0 and 2347, the Access Point uses the RTS/CTS mechanism for packets that are the specified size or greater. You should not need to enable
this parameter for most networks unless you suspect that the wireless cell contains hidden nodes.
Wireless Service Status
The user can shut down (or resume) the wireless service on the wireless interface of the AP through the CLI, HTTP, or SNMP interface. When
the wireless service on a wireless interface is shut down, the AP will:
•
Stop the AP services to wireless clients connected on that wireless interface by disassociating them
• Disable the associated BSS ports on that interface
• Disable the transmission and reception of frames on that interface
• Indicate the wireless service shutdown status of the wireless interface through LED and traps
• Enable Ethernet interface so that it can receive a wireless service resume command through CLI/HTTP/SNMP interface
NOTE
WSS disables only BSS ports; WDS ports are still operational.
NOTE
The wireless service cannot be shutdown on an interface where Rogue Scan is enabled.
In shutdown state, AP will not transmit and receive frames from the wireless interface and will stop transmitting periodic beacons. Moreover,
none of the frames received from the Ethernet interface will be forwarded to that wireless interface.
Wireless service on a wireless interface of the AP can be resumed through CLI/HTTP/SNMP management interface. When wireless service
on a wireless interface is resumed, the AP will:
•
Enable the transmission and reception of frames on that wireless interface
• Enable the associated BSS port on that interface
• Start the AP services to wireless clients
• Indicate the wireless service resume status of the wireless interface through LED and traps
After wireless service resumes, the AP resumes beaconing, transmitting and receiving frames to/from the wireless interface and bridging the
frames between the Ethernet and the wireless interface.
Traps Generated During Wireless Service Shutdown (and Resume)
The following traps are generated during wireless service shutdown and resume, and are also sent to any configured Syslog server.
When the wireless service is shut down on a wireless interface, the AP generates a trap called oriTrapWirelessServiceShutdown.
When the wireless service is resumed on a wireless interface, the AP generate a trap called oriTrapWirelessServiceResumed.
Multicast Rate
The multicast rate determines the rate at which broadcast and multicast packets are transmitted by the Access Point to the wireless network.
Stations that are closer to the Access Point can receive multicast packets at a faster data rate than stations that are farther away from the AP.
Therefore, you should set the Multicast Rate based on the size of the Access Point’s cell.
NOTE
Multicast Rate cannot be set by the HTTP interface; it must be set via CLI.
Cells of different sizes have different capacities and, therefore, suit different applications. For instance, a typical office has many stations that
require high bandwidth for complex, high-speed data processing. In contrast, a typical warehouse has a few forklifts requiring low bandwidth
for simple transactions.