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4 - 6 Aironet 340 Series Bridge<br />

Adding IEEE 802.11 Management Packet Extensions (Extend)<br />

If this parameter is enabled, the Aironet 340 Series Bridge will add<br />

extensions to some of the IEEE 802.11 management packets. This passes<br />

more information to other radio no<strong>de</strong>s allowing them to associate to the<br />

best bridge.<br />

Even with the extensions enabled, other manufacturer’s no<strong>de</strong>s should<br />

ignore the extra information. However, if they become confused, this<br />

parameter may be disabled.<br />

Allowing the Broadcast SSID (Bcst_ssid)<br />

This option controls whether client no<strong>de</strong>s will be allowed to associate if<br />

they specify the empty or broadcast SSID. Clients that do not know the<br />

SSID of the bridge can transmit packets with the broadcast SSID. Any<br />

bridges present will respond with a packet <strong>show</strong>ing their SSID. The client<br />

will then adopt the SSID and associate.<br />

If you wish to ensure that clients know the SSID beforehand then disable<br />

this function.<br />

Setting the RF RTS/CTS Parameter (RTS)<br />

This parameter <strong>de</strong>termines the minimum size transmitted packet that<br />

will use the RTS/CTS protocol. The value entered must be in the range<br />

of 100 to 2048 bytes.<br />

This protocol is most useful in networks where the mobile no<strong>de</strong>s may<br />

roam far enough so the no<strong>de</strong>s on one si<strong>de</strong> of the cell cannot hear the<br />

transmission of the no<strong>de</strong>s on the other si<strong>de</strong> of the cell.<br />

When the transmitted packet is large enough, a small packet is sent out<br />

(an RTS). The <strong>de</strong>stination no<strong>de</strong> must respond with another small packet<br />

(a CTS) before the originator may send the real data packet. A no<strong>de</strong> at<br />

the far end of a cell will see the RTS to/from the bridge or the CTS to/<br />

from the bridge. The no<strong>de</strong> will know how long to block its transmitter to<br />

allow the real packet to be received by the bridge. The RTS and CTS are<br />

small and, if lost in a collision, they can be retried more quickly and<br />

with less overhead than if the whole packet must be retried.

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