Enabling Portfast Bpdu Filtering - Cisco WS-C6506 Software Manual

Configuring PortFast BPDU Filtering on the Switch

Enabling PortFast BPDU Filtering

To enable PortFast BPDU filtering on a nontrunking port, perform this task in privileged mode:
Task
Step 1
Set the BPDU filter state on the port.
Step 2 Verify the PortFast BPDU filter setting.
BPDU filtering is set to default on each port. This example shows how to enable PortFast BPDU filtering
on the port and verify the configuration in PVST+ mode:
For PVST+ information, see
Note
Console> (enable) set spantree portfast bpdu-filter 6/1 enable
Warning:Ports enabled with bpdu filter will not send BPDUs and drop all
received BPDUs. You may cause loops in the bridged network if you misuse
this feature.
Console> (enable) show spantree summary
Root switch for vlans: none.
Portfast bpdu-filter enabled for bridge.
Uplinkfast disabled for bridge.
Backbonefast disabled for bridge.
Vlan
----- -------- --------- -------- ---------- ----------
850
917
999
1003
1005
----- -------- --------- -------- ---------- ----------
Total
Console> (enable)
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
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Chapter 9 Configuring Spanning-Tree PortFast, UplinkFast, BackboneFast, and Loop Guard
Command
set spantree portfast bpdu-filter mod/port
[disable | enable | default]
show spantree summary
Chapter 7, "Configuring Spanning Tree."
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