Reference Guide

* Disabling global spanning tree (using the no spanning-tree command in CONFIGURATION
mode).
To verify that EdgePort is enabled, use the show config command from INTERFACE mode.
Example of Enabling an EdgePort on an Interface
FTOS(conf-if-gi-3/41)#spanning-tree mstp edge-port
FTOS(conf-if-gi-3/41)#show config
!
interface GigabitEthernet 3/41
no ip address
switchport
spanning-tree mstp edge-port
spanning-tree MSTI 1 priority 144
no shutdown
FTOS(conf-if-gi-3/41)#
Flush MAC Addresses after a Topology Change
FTOS has an optimized MAC address flush mechanism for RSTP, MSTP, and PVST+ that flushes addresses only when
necessary, which allows for faster convergence during topology changes.
However, you may activate the flushing mechanism defined by 802.1Q-2003 using the tc-flush-standard
command, which flushes MAC addresses after every topology change notification.
To view the enable status of this feature, use the show running-config spanning-tree mstp command
from EXEC Privilege mode.
MSTP Sample Configurations
The running-configurations support the topology shown in the following illustration.
The configurations are from FTOS systems.
Figure 92. MSTP with Three VLANs Mapped to Two Spanning Tree Instances
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