Cabletron Systems 2.2 Manuel D’Utilisation

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Bridging
2-62
Using the Find Source Address Feature
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Disabled
 (not participating in the bridging process or in operation of the 
Spanning Tree Algorithm and protocol). If the Spanning Tree Mode is set to 
Disabled, the bridge port will not send or accept any STE frames. Any STE 
frame received will be discarded. The Spanning Tree Expl Þeld at the 
ConÞguration window, and the STE Frames Þeld at the Status window will 
both read ÒDisabled.Ó
Making and Setting Changes
The Source Route ConÞguration window allows you to affect changes for the 
following Source Route Bridging parameters: Bridge Number, Local Segment, 
Target Segment, Hop Count Limit, and the deviceÕs Spanning Tree Mode.
To make a change to Bridge Number, Local Segment, Target Segment, or Hop 
Count Limit, use the mouse to highlight the existing value in the desired Þeld, 
and type in a new value.
To set the Spanning Tree Mode to Auto or Manual, click on the option button next 
to the appropriate selection. If set to Auto, a Spanning Tree Algorithm will 
calculate the deviceÕs priority in a series of parallel bridges to determine a root 
bridge on the network. If set to Manual, you conÞgure a Spanning Tree by 
administratively enabling or disabling each bridging port on the network.
When the deviceÕs Spanning Tree Mode is set to Manual, you can change how a 
bridge port will treat a Spanning Tree Explorer frame. Use the Enable checkbox to 
allow STE frame forwarding at the port, or use the Disabled checkbox to prevent 
STE frame forwarding at the port. Click on the Enabled or Disabled checkbox to 
make your selection.
When you make changes in the Source Route ConÞguration window, they are not 
implemented at the device until you click on the Set button. This will cause the 
device to reboot. Since rebooting the device will bring it down for several 
minutes, a ÒReset with new parameters?Ó pop-up dialog box will appear to 
ensure that you are ready. Click on OK to set the changes, or Cancel to return to 
the Source Route ConÞguration window.
Using the Find Source Address Feature
You can select the Find Source Address option to discover which bridging 
interface a speciÞed source MAC address is communicating through. When you 
select the Find Source Address option, a search is made of the 802.1d Bridge 
Filtering Database to discover the bridge interface associated with the address 
that you specify. If the search is successful, the corresponding interface will ßash 
in the Chassis View window. See 
Use the Find Source Address feature as follows:
1.
Click to display the Device menu.
2.
Click again on Find Source Address. The following window will appear.