Flush Mac Addresses After A Topology Change; Displaying Stp Guard Configuration - Dell Force10 C150 Configuration Manual

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 command
which flushes MAC addresses upon every topology change notification. View the enable status of this
feature using the command

Displaying STP Guard Configuration

To verify the STP guard configured on MSTP interfaces, enter the
[instance-number] guard
information on how to configure and use the STP root guard, loop guard, and BPDU guard features.
Figure 29-9
• Root guard is enabled on a port that is in a root-inconsistent state.
• Loop guard is enabled on a port that is in a forwarding state.
• BPDU guard is enabled on a port that is shut down.
Figure 29-9. Displaying STP Guard Configuration
FTOS#show spanning-tree msti 5 guard
Interface
Name
---------
Gi 0/1
Gi 0/2
Gi 0/3
654 | Multiple Spanning Tree Protocol
show running-config spanning-tree mstp
command. Refer to
shows an example for instance 5 in an MSTP network in which:
Instance Sts
-------- ---------
5 INCON(Root)
5 FWD
5 EDS(shut)
Chapter 52, "Spanning Tree Protocol," on page 1049
Guard type
----------
Root
Loop
Bpdu
tc-flush-standard
from EXEC Privilege mode.
show spanning-tree msti
,
for