Spanning-Tree Portfast Bpdufilter Default - Cisco MWR 2941 Command Reference Manual

spanning-tree portfast bpdufilter default

spanning-tree portfast bpdufilter default
To enable bridge protocol data unit (BPDU) filtering by default on all PortFast ports, use the
spanning-tree portfast bpdufilter default command in global configuration mode. To return to the
default settings, use the no form of this command.
Syntax Description This command has no arguments or keywords.
Command Default
Disabled
Command Modes
Global configuration (config)
Command History Release
12.2(14)SX
12.2(17d)SXB
12.2(33)SRA
15.0(1)MR
Usage Guidelines The spanning-tree portfast bpdufilter command enables BPDU filtering globally on PortFast ports.
BPDU filtering prevents a port from sending or receiving any BPDUs.
You can override the effects of the portfast bpdufilter default command by configuring BPDU filtering
at the interface level.
Note Be careful when enabling BPDU filtering. The feature's functionality is different when you enable it on
a per-port basis or globally. When enabled globally, BPDU filtering is applied only on ports that are in
an operational PortFast state. Ports send a few BPDUs at linkup before they effectively filter outbound
BPDUs. If a BPDU is received on an edge port, it immediately loses its operational PortFast status and
BPDU filtering is disabled.
When enabled locally on a port, BPDU filtering prevents the Catalyst 6500 series switch from receiving
or sending BPDUs on this port.
Be careful when using this command. Using this command incorrectly can cause bridging loops.
Caution
Cisco MWR 2941 Router Command Reference, Release 15.0(1)MR
644
spanning-tree portfast bpdufilter default
no spanning-tree portfast bpdufilter default
Modification
Support for this command was introduced on the Supervisor Engine 720.
Support for this command on the Supervisor Engine 2 was extended to
Release 12.2(17d)SXB.
This command was integrated into Cisco IOS Release 12.2(33)SRA.
This command was integrated into 15.0(1)MR.
Cisco MWR 2941 Router Command Reference, Release 15.0(1)MR
OL-23890-01