C
HAPTER
34
| Spanning Tree Commands
– 1077 –
DEFAULT SETTING
0
COMMAND MODE
MST Configuration
COMMAND USAGE
The MST region name (page 1076) 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 (1076)
spanning-tree
bpdu-filter
This command filters all BPDUs received 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
â—† This command filters all Bridge Protocol Data Units (BPDUs) received 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.
â—† Before enabling BPDU Filter, the interface must first be configured as an
edge port with the spanning-tree edge-port command.
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