Enterasys Networks RBT-4102 manual

Radio Interface

faster. Using higher DTIM values reduces the power used by stations in Power Save mode, but delays the transmission of broadcast/multicast frames. Range: 1‐255 beacons; Default: 2 beacons

•Fragment Length (256‐2346) specifies an alternative frame length for packets. When transmitting data via the wireless network, your wireless network automatically splits up the file or message in a number of different packets that are re‐assembled again by the communication partner. Enterasys RoamAbout products use standard IEEE 802.11 compatible frame lengths, where different lengths apply for each Transmit Rate. Fragmentation will apply alternative (usually shorter) frame lengths to split and reassemble the wireless data frames. Default: 2346.

•RTS Threshold (0‐2347) sets the Request to Send (RTS) threshold frame length between 0 and 2,327 bytes. You can configure the access point to initiate an RTS frame sequence always, never, or only on frames longer than a specified length. If the packet size is smaller than the preset RTS threshold size, the RTS/CTS mechanism will NOT be enabled.

The access point sends request to send (RTS) frames to a particular receiving station to negotiate the sending of a data frame. After receiving an RTS, the station send a CTS (Clear to Send) frame to acknowledge the right for the station to send data frames.

The access point contending for the medium may not be aware of each other. The RTS/CTS mechanism can solve this ʺHidden Node Problemʺ.

If the RTS threshold is set to 0, the access point never sends RTS signals. If set to 2347, the access point always sends RTS signals. If set to any other value, and the packet size equals or exceeds the RTS threshold, the RTS/CTS (Request to Send / Clear to Send) mechanism will be enabled. Range: 0‐2347 bytes. Default: 2347 bytes

RoamAbout RBT-4102 Wireless Access Point Configuration Guide 4-61