Resetting Portfast; Configuring Portfast Bpdu Guard On The Switch; Enabling Portfast Bpdu Guard - Cisco WS-C6506 Software Manual

Chapter 9 Configuring Spanning-Tree PortFast, UplinkFast, BackboneFast, and Loop Guard

Resetting PortFast

To reset PortFast on a switch or trunk port to its default settings, perform this task in privileged mode:
Task
Step 1
Reset PortFast to its default settings on a switch
port.
Step 2 Verify the PortFast setting.
This example shows how to reset PortFast to its default settings on port 1 of module 4:
Console> (enable) set spantree portfast 4/1 default
Spantree port
Console> (enable) show spantree portfast 4/1
Portfast:default
Portfast BPDU guard is disabled.
Portfast BPDU filter is disabled.
Console> (enable)

Configuring PortFast BPDU Guard on the Switch

These sections describe how to configure PortFast BPDU guard on the switch:
•
•

Enabling PortFast BPDU Guard

The PortFast feature is configured on an individual port and the PortFast BPDU guard option is
configured either globally or on a per-port basis.
When you disable PortFast on a port, PortFast BPDU guard becomes inactive. Port configuration
overrides global configuration unless port configuration is set to default. If port configuration is set to
default, global configuration is checked. If the port configuration is enabled, the port configuration is
used and the global configuration is not used.
To enable PortFast BPDU guard on a nontrunking switch port, perform this task in privileged mode:
Task
Step 1 Enable BPDU guard on an individual port.
Step 2
Verify the PortFast BPDU guard setting.
OL-8978-04
4/1 fast start set to default.
Enabling PortFast BPDU Guard, page 9-11
Disabling PortFast BPDU Guard, page 9-12
Command
set spantree portfast mod_num/port_num
default
show spantree mod_num/port_num
Command
set spantree portfast bpdu-guard mod/port
[disable | enable | default]
show spantree summary
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
Configuring PortFast BPDU Guard on the Switch
9-11