Bridging

2-62 Using the Find Source Address Feature

¥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 Filtering Database, page 2-41, for details.
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.