Cisco WS-C2960-48TT-S-RF Software Guide - Page 169
Configuring PortFast BPDU Filtering
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Chapter 8 Configuring Spanning Tree PortFast, BPDU Guard, BPDU Filter, UplinkFast, BackboneFast, and Loop Guard Configuring PortFast BPDU Filtering 3 0 0 0 4 4 4 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) Configuring PortFast BPDU Filtering The following sections describe how to configure PortFast BPDU filtering on the switch. Enabling PortFast BPDU Filtering Note Although you can configure PortFast on an individual port, you configure the PortFast BPDU filtering option globally. When you disable PortFast on a port, PortFast BPDU filtering becomes inactive for that port. To enable PortFast BPDU filtering, perform this task in privileged mode: Task Step 1 Enable BPDU filtering state on the port. Step 2 Verify PortFast BPDU filtering setting. Command set spantree portfast bpdu-filter mod/port [disable | enable | default] show spantree summary Note For additional PVST+ information, see Chapter 7, "Configuring Spanning Tree." By default, BPDU filtering is set for each port. This example shows how to enable PortFast BPDU filtering on the port and verify the configuration in PVST+ mode: 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 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 8-13
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