ZyXEL Communications ZyWALL 110 User Manual page 592

Table 247 Configuration > Object > AP Profile > Add/Edit Radio Profile (continued)
LABEL DESCRIPTION
Enable A-MSDU Select this to enable A-MSDU aggregation.
Aggregation
Mac Service Data Unit (MSDU) aggregation collects Ethernet frames without any of
their 802.11n headers and wraps the header-less payload in a single 802.11n MAC
header. This method is useful for increasing bandwidth throughput. It is also more
efficient than A-MPDU except in environments that are prone to high error rates.
A-MSDU Limit Enter the maximum frame size to be aggregated.
RTS/CTS Use RTS/CTS to reduce data collisions on the wireless network if you have wireless
Threshold
clients that are associated with the same AP but out of range of one another. When
enabled, a wireless client sends an RTS (Request To Send) and then waits for a CTS
(Clear To Send) before it transmits. This stops wireless clients from transmitting
packets at the same time (and causing data collisions).
A wireless client sends an RTS for all packets larger than the number (of bytes) that
you enter here. Set the RTS/CTS equal to or higher than the fragmentation threshold
to turn RTS/CTS off.
Beacon Interval When a wirelessly networked device sends a beacon, it includes with it a beacon
interval. This specifies the time period before the device sends the beacon again. The
interval tells receiving devices on the network how long they can wait in low-power
mode before waking up to handle the beacon. A high value helps save current
consumption of the access point.
DTIM Delivery Traffic Indication Message (DTIM) is the time period after which broadcast and
multicast packets are transmitted to mobile clients in the Active Power Management
mode. A high DTIM value can cause clients to lose connectivity with the network. This
value can be set from 1 to 255.
Enable Signal Select the check box to use the signal threshold to ensure wireless clients receive good
Threshold
throughput. This allows only wireless clients with a strong signal to connect to the AP.
Clear the check box to not require wireless clients to have a minimum signal strength
to connect to the AP.
Station Signal Set a minimum client signal strength. A wireless client is allowed to connect to the AP
Threshold
only when its signal strength is stronger than the specified threshold.
-20 dBm is the strongest signal you can require and -76 is the weakest.
Disassociate Set a minimum kick-off signal strength. When a wireless client's signal strength is
Station
lower than the specified threshold, the ZyWALL/USG disconnects the wireless client
Threshold
from the AP.
-20 dBm is the strongest signal you can require and -90 is the weakest.
Allow Station Select this option to allow a wireless client to try to associate with the AP again after it
Connection after
is disconnected due to weak signal strength.
Multiple Retries
Station Retry Set the maximum number of times a wireless client can attempt to re-connect to the
Count
AP
Multicast Settings Use this section to set a transmission mode and maximum rate for multicast traffic.
Transmission Set how the AP handles multicast traffic.
Mode
Select Multicast to Unicast to broadcast wireless multicast traffic to all of the wireless
clients as unicast traffic. Unicast traffic dynamically changes the data rate based on the
application's bandwidth requirements. The retransmit mechanism of unicast traffic
provides more reliable transmission of the multicast traffic, although it also produces
duplicate packets.
Select Fixed Multicast Rate to send wireless multicast traffic at a single data rate.
You must know the multicast application's bandwidth requirements and set it in the
following field.
Chapter 35 Object
ZyWALL/USG Series User's Guide
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