Cisco WS-C6506 User Manual

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Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
OL-8978-04
Chapter 7 Configuring Spanning Tree
Configuring BPDU Skewing on the Switch
Console> (enable) show spantree mst config
Current (NVRAM) MST Region Configuration: 3 instances
Configuration Name:arthur Revision:23703
Instance VLANs
-------- --------------------------------------------------------------
0 1,31-4094
2 2-20
3 21-30
=======================================================================
NEW MST Region Configuration (Not committed yet) 4 instances
Configuration Name:arthur Revision:23703
Instance VLANs
-------- --------------------------------------------------------------
0 1,31-899,1000-4094
2 2-20
3 21-30
1400 900-999
=======================================================================
Edit buffer is locked by:Console (pid 143)
Console> (enable) clear spantree mst 1400 vlan 900-998
Edit Buffer modified.
Use 'set spantree mst config commit' to apply the changes
Console> (enable) set spantree mst config commit
Console> (enable) show spantree mst config
Current (NVRAM) MST Region Configuration: 4 instances
Configuration Name:arthur Revision:23703
Instance VLANs
-------- --------------------------------------------------------------
0 1,31-998,1000-4094
2 2-20
3 21-30
1400 999
=======================================================================
Console> (enable)
Configuring BPDU Skewing on the Switch
Commands that support the spanning-tree BPDU skewing allow you to perform these functions:
• Enable or disable BPDU skewing. The default is disabled.
• Modify the show spantree summary output to show if the skew detection is enabled and for which
VLANs or PVST+ or MISTP instances the skew was detected.
• Provide a display of the VLAN, PVST+, or MISTP instance and the port that is affected by the skew,
including this information:
– The last skew duration (in absolute time)
– The worst skew duration (in absolute time)
– The date and time of the worst duration
To change how spanning tree performs BPDU skewing statistics gathering, enter the set spantree
bpdu-skewing command. The bpdu-skewing command is disabled by default.
To configure the BPDU skewing statistics gathering for a VLAN, perform this task in privileged mode:

Cisco WS-C6506 Specifications

General

Brand	Cisco
Model	WS-C6506
Category	Switch
Language	English