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Chapter 9
Configuring Spanning-Tree PortFast, UplinkFast, BackboneFast, and Loop Guard
Disabling PortFast BPDU Filtering
To disable PortFast BPDU filtering on the switch, perform this task in privileged mode:
Task
Step 1
Disable PortFast BPDU filtering on the switch.
Step 2
Verify the PortFast BPDU filter setting.
This example shows how to disable PortFast BPDU filtering on the switch and verify the configuration:
Console> (enable) set spantree portfast bpdu-filter disable
Spantree portfast bpdu-filter disabled on this switch.
Console> (enable) show spantree summary
Summary of connected spanning tree ports by vlan
Portfast bpdu-filter disabled for bridge.
Uplinkfast disabled for bridge.
Backbonefast disabled for bridge.
Vlan
----- -------- --------- -------- ---------- ----------
10
.
.
802
850
917
999
1003
1005
----- -------- --------- -------- ---------- ----------
Total
Console> (enable)
Configuring UplinkFast on the Switch
You can configure UplinkFast for PVST+ or for Multi-Instance Spanning Tree Protocol (MISTP). The
command is the same but the output may be slightly different.
For additional MISTP information, see
Note
These sections describe how to configure UplinkFast on the switch:
•
•
OL-8978-04
Blocking Listening Learning Forwarding STP Active
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Blocking Listening Learning Forwarding STP Active
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Enabling UplinkFast, page 9-16
Disabling UplinkFast, page 9-17
Command
set spantree portfast bpdu-filter disable
show spantree summary
show portfast
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Chapter 7, "Configuring Spanning Tree."
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
Configuring UplinkFast on the Switch
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9-15
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Troubleshooting
