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8 - 14 Aironet 340 Series Bridge<br />

If the timeout period is set too low, the spanning tree infrastructure may<br />

reconfigure itself unnecessarily and messages can be lost due to heavy<br />

traffic on the infrastructure. However, if set too high, the infrastructure<br />

will take longer than necessary to recover from failed <strong>port</strong>s or bridges.<br />

The upper limit on the allowed range is <strong>de</strong>termined by the setting of the<br />

forwarding <strong>de</strong>lay. The timeout period must be less than twice the forwarding<br />

<strong>de</strong>lay, minus 1 second. The timeout values range between 6 and<br />

29 with a <strong>de</strong>fault value of 20.<br />

Setting Port Parameters (Port)<br />

The <strong>port</strong> option allows you to set the <strong>port</strong> parameters for a root bridge’s<br />

local LAN <strong>port</strong> and for the <strong>port</strong>s of any active connected repeaters.<br />

When the <strong>port</strong> option is selected, the Configuration STP Port Menu<br />

appears.<br />

Configuration Stp Port Menu<br />

Option Value Description<br />

1 - Port [ on ] - Protocol enabled for ethernet <strong>port</strong><br />

2 - Priority [ 80 ] - Local ethernet <strong>port</strong> priority<br />

3 - Cost [ 100 ] - Local ethernet <strong>port</strong> cost<br />

4 - R<strong>port</strong> - Protocol enabled for remote <strong>port</strong><br />

5 - Rpriority - Remote <strong>port</strong> priority<br />

6 - Rcost - Remote <strong>port</strong> cost<br />

Enabling the STP Protocol (Port)<br />

The <strong>port</strong> option is used to enable the STP protocol on the local <strong>port</strong>. The<br />

<strong>de</strong>fault setting is “On”, which allows all root bridge LAN <strong>port</strong>s to be initially<br />

placed in the listening state. If the option is turned “Off”, the LAN<br />

<strong>port</strong>s are placed in the forwarding state.<br />

If the <strong>port</strong>’s LAN will always be connected to the bridge and loops will<br />

never occur, turn the protocol “Off” to prevent the <strong>port</strong> from transmitting<br />

configuration messages on every timeout period.

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