Spanning-Tree Loopback-Guard - Cisco 300 Series Cli Manual
Stackable managed switches
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- Cli manual (899 pages) ,
- Administration manual (586 pages) ,
- Quick start manual (72 pages)
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Spanning-Tree Commands
OL-32830-01 Command Line Interface Reference Guide
Default Configuration
Show information for all interfaces. If detailed is not used, only present ports are
displayed.
Command Mode
User EXEC mode
Example
The following examples display spanning-tree BPDU information:
switchxxxxxx#
show spanning-tree bpdu
The following is the output if the global BPDU handling
command is not supported.
Interface
Admin Mode
---------
----------
gi1
1
Filtering
gi1
Filtering
2
gi13
Filtering
The following is the output if both the global BPDU
handling command and the per-interface BPDU handling
command are supported.
Global: Flooding
Interface
Admin Mode
---------
----------
gi11
Global
gi12
Global
gi13
Flooding
46.31 spanning-tree loopback-guard
Use the spanning-tree loopback-guard global configuration command to shut
down an interface if it receives a loopback BPDU. Use the no form of this
command to return the default setting.
Oper Mode
---------
Filtering
Filtering
Guard
Oper Mode
---------
Flooding
STP
STP
46
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