Chapter 17
| Spanning Tree Commands
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Command Mode
MST Configuration
Command Usage
The MST region name (
) 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
spanning-tree
bpdu-filter
This command allows you to avoid transmitting BPDUs on configured edge
ports that are connected to end nodes. 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 stops all Bridge Protocol Data Units (BPDUs) from being
transmitted on configured edge ports 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.
◆
BPDU filter can only be configured on an interface if the edge port attribute
is not disabled (that is, if edge port is set to enabled or auto with the
command).