4-86 WS5100 Series Switch System Reference Guide
RTS Threshold | Specify a Request To Send (RTS) threshold (in bytes) for use by the WLAN's adopted access |
| ports. |
| RTS is a transmitting station's signal that requests a Clear To Send (CTS) response from a |
| receiving station. This RTS/CTS procedure clears the air where many MUs (or nodes) are |
| contending for transmission time. Benefits include fewer data collisions and better |
| communication with nodes that are hard to find (or hidden) because of other active nodes in |
| the transmission path. |
| Control RTS/CTS by setting an RTS threshold. This setting initiates an RTS/CTS exchange for |
| data frames larger than the threshold, and simply sends (without RTS/CTS) any data frames |
| that are smaller than the threshold. |
| Consider the |
| ports. A lower RTS threshold causes more frequent RTS/CTS exchanges. This consumes |
| more bandwidth because of the additional latency (RTS/CTS exchanges) before |
| transmissions can commence. A disadvantage is the reduction in |
| advantage is quicker system recovery from electromagnetic interference and data collisions. |
| Environments with more wireless traffic and contention for transmission make the best use |
| of a lower RTS threshold. |
| A higher RTS threshold minimizes RTS/CTS exchanges, consuming less bandwidth for data |
| transmissions. A disadvantage is less help to nodes that encounter interference and |
| collisions. An advantage is faster |
| traffic and contention for transmission make the best use of a higher RTS threshold. Default |
| is 2346. |
Beacon Interval | Specify a beacon interval in units of 1,000 microseconds |
| value, for example, 100: 10. (See "DTIM Period," below). A beacon is a packet broadcast by |
| the adopted access ports to keep the network synchronized. Included in a beacon is |
| information such as the WLAN service area, the |
| destination addresses, a time stamp, and indicators about traffic and delivery such as a |
| DTIM. |
| Increase the DTIM/beacon settings (lengthening the time) to let nodes sleep longer and |
| preserve battery life. Decrease these settings (shortening the time) to support streaming- |
| multicast audio and video applications that are |
DTIM Period | Specify a period for the Delivery Traffic Indication Message (DTIM). This is a divisor of the |
| beacon interval (in milliseconds), for example, 10 : 100. (See "Beacon Interval," above). A |
| DTIM is periodically included in the beacon frame transmitted from adopted access ports. |
| The DTIM period determines how often the beacon contains a DTIM, for example, 1 DTIM |
| for every 10 beacons. The DTIM indicates that broadcast and multicast frames (buffered at |
| the access port) are soon to arrive. These are simple data frames that require no |
| acknowledgement, so nodes sometimes miss them. Increase the DTIM/beacon settings |
| (lengthening the time) to let nodes sleep longer and preserve their battery life. Decrease |
| these settings (shortening the time) to support |
| applications that are |
Self Healing Offset | When an access port increases its power to compensate for a failed access port i, power is |
| increased to the country's regulatory maximum. Set the Self Healing Offset to reduce the |
| country's regulatory maximum power if access ports are situated close to each other or if |
| access ports s use external antennas. For additional information on determining the offset |
| value, see the documentation shipped with the access port. |
12.Refer to the Status field for the current state of the requests made from applet. This field displays error messages if something goes wrong in the transaction between the applet and the switch.
13.Click OK to use the changes to the running configuration and close the dialog.