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Spanning Tree
Configuring Rapid Spanning Tree Settings
199 Cisco Small Business 200 Series Smart Switch Administration Guide
13
• Designated Bridge ID—Displays the bridge priority and the MAC address
of the designated bridge.
• Designated Port ID—Displays the priority and interface of the selected
port.
• Designated Cost—Displays the cost of the port participating in the STP
topology. Ports with a lower cost are less likely to be blocked if STP detects
loops.
• Forward Transitions—Displays the number of times the port has changed
from the Blocking state to Forwarding state.
• Speed—Displays the speed of the port.
• LAG—Displays the LAG to which the port belongs. If a port is a member of
a LAG, the LAG settings override the port settings.
STEP 4 Click Apply. The interface settings are written to the Running Configuration file.
Configuring Rapid Spanning Tree Settings
Rapid Spanning Tree Protocol (RSTP) enables a faster STP convergence without
creating forwarding loops.
The RSTP Interface Settings page enables you to configure RSTP per port. Any
configuration that is done on this page is active when the global STP mode is set
to RSTP .
To enter RSTP settings:
STEP 1 Click Spanning Tree > STP Status and Global Settings. Enable RSTP.
STEP 2 Click Spanning Tree > RSTP Interface Settings. The RSTP Interface Settings
page appears:
STEP 3 Select a port.
NOTE Activate Protocol Migration is only available after selecting the port
that is connected to the bridge partner being tested.
STEP 4 If a link partner is discovered by using STP, click Activate Protocol Migration to
run a Protocol Migration test. This discovers whether the link partner using STP
still exists, and if so whether it has migrated to RSTP. If it still exists as an STP link,