CLI Reference Guide-R03

Chapter 18 | Spanning Tree Commands
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Default Setting
0
Command Mode
MST Configuration
Command Usage
The MST region name (page 448) and revision number are used to designate a
unique MST region. A bridge (i.e., spanning-tree compliant device such as this
switch) can only belong to one MST region. And all bridges in the same region must
be configured with the same MST instances.
Example
Console(config-mstp)#revision 1
Console(config-mstp)#
Related Commands
name (448)
spanning-tree
bpdu-filter
This command filters all BPDUs transmitted on an edge port. Use the no form to
disable this feature.
Syntax
[no] spanning-tree bpdu-filter
Default Setting
Disabled
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
◆ This command filters all Bridge Protocol Data Units (BPDUs) that would
otherwise be transmitted on an interface to save CPU processing time. This
function is designed to work in conjunction with edge ports which should only
connect end stations to the switch, and therefore do not need to process
BPDUs. However, note that if a trunking port connected to another switch or
bridging device is mistakenly configured as an edge port, and BPDU filtering is
enabled on this port, this might cause a loop in the spanning tree.
◆ Before enabling BPDU Filter, the interface must first be configured as an edge
port with the spanning-tree edge-port command.