Chapter 22 Spanning Tree Protocol
Table 50 Spanning Tree Protocol Status (continued)
LABEL | DESCRIPTION |
Root port ID | This is the priority and number of the port on the switch through which this |
| switch must communicate with the root of the Spanning Tree. “0x0000” displays |
| when this device is the root switch. |
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|
Root max age | This is the maximum time (in seconds) the root switch can wait without receiving |
(second) | a configuration message before attempting to reconfigure. |
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|
Root hello time | This is the time interval (in seconds) at which the root switch transmits a |
(second) | configuration message. The root bridge determines Hello Time, Max Age and |
| Forwarding Delay. |
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|
Root forward delay | This is the time (in seconds) the root switch will wait before changing states |
(second) | (that is, listening to learning to forwarding). |
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|
Max age (second) | This is the maximum time (in seconds) the |
| receiving a configuration message before attempting to reconfigure. |
|
|
Hello time (second) | This is the time interval (in seconds) at which the |
| configuration message. The root bridge determines Hello Time, Max Age and |
| Forwarding Delay. |
|
|
Forward delay | This is the time (in seconds) the |
(second) | (that is, listening to learning to forwarding). |
|
|
Port Status | This identifies the |
| activated, the following fields appear. If STP is not activated, Disabled appears. |
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|
State | This field displays the port’s RSTP (or STP) state. With RSTP, the state can be |
| discarding, learning or forwarding. With STP, the state can be disabled, |
| blocking, listening, learning, or forwarding. |
| Disabled appears when RSTP has not been turned on for the individual port or |
| the whole device. |
|
|
Port ID | This is the priority and number of the port on the switch through which this |
| switch must communicate with the root of the Spanning Tree. “0x0000” displays |
| when this device is the root switch. |
|
|
Path cost | This is the path cost from this port to the root switch. |
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|
Cost to root | This is the path cost from the root port on this switch to the root switch. |
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|
Designated bridge | This is the unique identifier for the bridge that has the lowest path cost to reach |
| the root bridge, consisting of bridge priority plus MAC address. |
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|
Designated port | This is the port on the designated bridge that has the lowest path cost to reach |
| the root bridge, consisting of bridge priority. |
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|
Poll Interval(s) | The text box displays how often (in seconds) this screen refreshes. You may |
Set Interval | change the refresh interval by typing a new number in the text box and then |
| clicking Set Interval. |
Stop | Click Stop to halt STP statistic polling. |
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22.3 Spanning Tree Protocol Screen
To open this screen, click Advanced Application, Spanning Tree Protocol, STP Config.
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