Enabling Bpdu Filtering Globally - Cisco Nexus 9000 Series Configuration Manual

Enabling BPDU Filtering Globally

Enabling BPDU Filtering Globally
You can enable BPDU Filtering globally by default on spanning tree edge ports.
If an edge port with BPDU Filtering enabled receives a BPDU, it loses its operation status as edge port and
resumes the regular STP transitions. However, this port maintains its configuration as an edge port.
Be careful when using this command. Using this command incorrectly can cause bridging loops.
Caution
Before You Begin
Before you configure this feature, you should do the following:
• Ensure that STP is configured.
• Ensure that you have configured some spanning tree edge ports.
Note When enabled globally, BPDU Filtering is applied only on ports that are operational edge ports. 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 edge port status and BPDU Filtering is disabled.
Procedure
Step 1
Step 2
Step 3
Step 4
Cisco Nexus 9000 Series NX-OS Layer 2 Switching Configuration Guide, Release 7.x
168
Command or Action
config t
Example:
switch# config t
switch(config)#
spanning-tree port type edge bpdufilter default
Example:
switch(config)# spanning-tree port type
edge bpdufilter default
exit
Example:
switch(config)# exit
switch#
show spanning-tree summary
Example:
switch# show spanning-tree summary
Configuring STP Extensions Using Cisco NX-OS
Purpose
Enters configuration mode.
Enables BPDU Filtering by default on all
operational spanning tree edge ports. Global
BPDU Filtering is disabled by default.
Exits configuration mode.
(Optional)
Displays summary STP information.