Spanning-Tree Bpduguard - Cisco AP775A - Nexus Converged Network Switch 5010 Command Reference Manual
Cisco nexus 5000 series command reference, release 4.1(3)n1(1) (ol-16599-01, august 2009)
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Also See for AP775A - Nexus Converged Network Switch 5010:
- Configuration manual (1486 pages) ,
- Reference (886 pages) ,
- Release note (26 pages)
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Chapter 2
Ethernet Commands
S e n d c o m m e n t s t o n x 5 0 0 0 - d o c f e e d b a c k @ c i s c o . c o m
spanning-tree bpduguard
To enable BPDU Guard on an interface, use the spanning-tree bpduguard command. To return to the
default settings, use the no form of this command.
Syntax Description
enable
disable
Command Default
The setting that is already configured when you enter the
default
Command Modes
Interface configuration mode
Command History
Release
4.0(0)N1(1a)
Usage Guidelines
BPDU Guard prevents a port from receiving BPDUs. If the port still receives a BPDU, it is put in the
error-disabled state as a protective measure.
Be careful when using this command. You should use this command only with interfaces that connect to
Caution
end stations; otherwise, an accidental topology loop could cause a data-packet loop and disrupt the
switch and network operation.
When you enable this BPDU Guard command globally, the command applies only to spanning tree edge
ports. See
command for BPDU Guard. However, when you enable this feature on an interface, it applies to that
interface regardless of the spanning tree port type.
This command has three states:
•
•
•
Typically, this feature is used in a service-provider environment where the network administrator wants
to prevent an access port from participating in the spanning tree.
OL-16599-01
spanning-tree bpduguard {enable | disable}
no spanning-tree bpduguard
Enables BPDU Guard on this interface.
Disables BPDU Guard on this interface.
command.
Modification
This command was introduced.
spanning-tree port type edge bpduguard default
spanning-tree bpduguard enable—Unconditionally enables BPDU Guard on the interface.
spanning-tree bpduguard disable—Unconditionally disables BPDU Guard on the interface.
no spanning-tree bpduguard—Enables BPDU Guard on the interface if it is an operational
spanning tree edge port and if the
configured.
spanning-tree port type edge bpduguard
for more information on the global
spanning-tree port type edge bpduguard default
Cisco Nexus 5000 Series Command Reference
spanning-tree bpduguard
command is
2-49
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