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Device Configuration

ORiNOCO® 802.11n Access Points - Software Management Guide 33

Example: Let us consider a network with three Bridges (Bridge 1, Bridge 2 and Bridge 3)

Figure 5-6 STP Topology

• Bridge 1 and Bridge 2 are connected via both Wireless and Ethernet interface, while Bridge 3 is connected to Bridge 1

and Bridge 2 only via Wireless interface.

• To avoid a network loop between Bridge 1 and Bridge 2, the STP feature should be enabled on all the devices.

• Once the STP feature is enabled, Bridge 1, Bridge 2 and Bridge 3 change from Disable state to Listening state and

start exchanging the BPDU packets. Bridge 3, having the highest priority and smallest MAC Address, acts as the Root

Bridge, and Bridge 1 and Bridge 2 act as Designated Bridges.

• The Designated Bridges (Bridge 1 and Bridge 2) then determine the shortest low cost path via root port, to forward

the data from bridge 1 to bridge 2, on a loop- free bridged network.

• Bridge 1 and Bridge 2 switch from Listening state to Learning state where they update the learn tables and enable

the shortest low cost path determined.

• The STP enabled Bridge 2 then changes from Learning state to Blocking state and blocks all the longest high cost

paths, near both wireless and ethernet interfaces.

• Bridge 1 finally changes from Learning state to Forwarding state and forwards the data packet to Bridge 2 through

the shortest low cost path (via the root port of Bridge 3) enabled, avoiding loops on the network.

Navigate to CONFIGURATION > Network > STP. The Network STP Configuration screen appears.

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Proxim ORiNOCO Guía de instalación Pagina 33