Enabling Portfast Bpdu Filtering - Cisco 6500 Series Software Configuration Manual

Enabling PortFast BPDU Filtering

Router# show spanning-tree interface fastEthernet 4/4 detail
Port 196 (FastEthernet4/4) of VLAN0010 is forwarding
Port path cost 1000, Port priority 160, Port Identifier 160.196.
Designated root has priority 32768, address 00d0.00b8.140a
Designated bridge has priority 32768, address 00d0.00b8.140a
Designated port id is 160.196, designated path cost 0
Timers:message age 0, forward delay 0, hold 0
Number of transitions to forwarding state:1
The port is in the portfast mode by portfast trunk configuration
Link type is point-to-point by default
BPDU:sent 30, received 0
Router#
Enabling PortFast BPDU Filtering
These sections describe how to configure PortFast BPDU filtering on the switch:
To enable PortFast BPDU filtering globally, perform this task:
Command
Step 1
Router(config)# spanning-tree portfast
bpdufilter default
Step 2
Router# show spanning-tree summary totals
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
Router(config)# spanning-tree portfast bpdufilter default
Router(config)# ^Z
Router# show spanning-tree summary totals
Root bridge for:VLAN0010
EtherChannel misconfiguration guard is enabled
Extended system ID
Portfast
PortFast BPDU Guard
Portfast BPDU Filter is enabled by default
Loopguard
UplinkFast
BackboneFast
Pathcost method used is long
Name
---------------------- -------- --------- -------- ---------- ----------
2 vlans
Router#
Catalyst 6500 Series Switch Cisco IOS Software Configuration Guide—Release 12.1 E
16-10
Purpose
Enables BPDU filtering globally on the switch.
Verifies the configuration.
Chapter 15, "Configuring STP and IEEE 802.1s MST."
is disabled
is enabled by default
is disabled by default
is disabled by default
is disabled
is disabled
Blocking Listening Learning Forwarding STP Active
0 0
Chapter 16 Configuring Optional STP Features
0 3 3
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