USING THE SYSTEM CONFIGURATION PROGRAM
Parameter | Description |
|
Status | Displays current state of this port within the Spanning Tree: | |
| No Link | No link has been established on this port. |
| Disabled | Port has been disabled by the user or has |
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| failed diagnostics. |
| Blocking | Port receives STA configuration messages, |
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| but does not forward packets. |
| Listening | Port will leave blocking state due to |
|
| topology change, starts transmitting |
|
| configuration messages, but does not yet |
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| forward packets. |
| Learning | Port has transmitted configuration messages |
|
| for an interval set by the Forward Delay |
|
| parameter without receiving contradictory |
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| information. Port address table is cleared, |
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| and the port begins learning addresses. |
| Forwarding | The port forwards packets, and continues |
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| learning addresses. |
| The rules defining port status are: | |
| • A port on a network segment with no other STA | |
| compliant bridging device is always forwarding. | |
| • If two ports of a switch are connected to the same | |
| segment and there is no other STA device attached to | |
| this segment, the port with the smaller ID forwards | |
| packets and the other is blocked. | |
| • All ports are blocked when the switch is booted, then | |
| some of them change state to listening, to learning, | |
| and then to forwarding. | |
Designated | The cost for a packet to travel from this port to the root | |
Cost | in the current Spanning Tree configuration. The slower | |
| the media, the higher the cost. | |
Designated | The priority and MAC address of the device through | |
Bridge (ID) | which this port must communicate to reach the root of the | |
| Spanning Tree. | |
Designated | The priority and number of the port on the designated | |
Port (ID) | bridging device through which this switch must | |
| communicate with the root of the Spanning Tree. | |
