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Catalyst 6000 Family Software Configuration Guide—Releases 6.3 and 6.4
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Chapter 8 Configuring Spanning Tree
Configuring BPDU Skewing
This example shows how to configure BPDU skewing for VLAN 1 on module 8, port 2 and view the
skewing statistics:
Console> (enable)
show spantree bpdu-skewing
1 8/4
Bpdu skewing statistics for vlan 1
Port Last Skew ms Worst Skew ms Worst Skew Time
------ ------------- ------------- -------------------------
8/4 5869 108370 Tue Nov 21 2000, 06:25:59
You will receive a similar output when MISTP is running.
The
show spantree summary
command displays if BPDU skew detection is enabled and also lists the
VLANs or instances affected in the skew. This example shows the output when using the
show spantree
summary
command:
Console> (enable)
show spantree summary
Root switch for vlans: 1
BPDU skewing detection enabled for the bridge
BPDU skewed for vlans: 1
Portfast bpdu-guard disabled for bridge.
Portfast bpdu-filter disabled for bridge.
Uplinkfast disabled for bridge.
Backbonefast disabled for bridge.
Summary of connected spanning tree ports by vlan
VLAN Blocking Listening Learning Forwarding STP Active
----- -------- --------- -------- ---------- ----------
1 6 4 2 0 12
Blocking Listening Learning Forwarding STP Active
----- -------- --------- -------- ---------- ----------
Total 6 4 2 0 12
Console> (enable)
