Cisco WS-C6506 User Manual

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Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
OL-8978-04
Chapter 9 Configuring Spanning-Tree PortFast, UplinkFast, BackboneFast, and Loop Guard
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:
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:
Note For PVST+ information, see Chapter 7, “Configuring Spanning Tree.”
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 Blocking Listening Learning Forwarding STP Active
----- -------- --------- -------- ---------- ----------
1 0 0 0 4 4
2 0 0 0 4 4
3 0 0 0 4 4
4 0 0 0 4 4
5 0 0 0 4 4
6 0 0 0 4 4
850 0 0 0 4 4
917 0 0 0 4 4
999 0 0 0 4 4
1003 0 0 0 0 0
1005 0 0 0 0 0
Blocking Listening Learning Forwarding STP Active
----- -------- --------- -------- ---------- ----------
Total 0 0 0 85 85
Console> (enable)
Task Command
Step 1
Set the BPDU filter state on the port. set spantree portfast bpdu-filter mod/port
[disable | enable | default]
Step 2
Verify the PortFast BPDU filter setting. show spantree summary

Cisco WS-C6506 Specifications

General

Brand	Cisco
Model	WS-C6506
Category	Switch
Language	English