C
HAPTER
16
| STP Commands
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DEFAULT SETTING
Disabled
COMMAND USAGE
◆ This feature protects edge ports from receiving BPDUs. It prevents
loops by shutting down an edge port when a BPDU is received instead
of putting it into the spanning tree discarding state. In a valid
configuration, configured edge ports should not receive BPDUs. If an
edge port receives a BPDU, an invalid configuration exists, such as a
connection to an unauthorized device. The BPDU guard feature
provides a secure response to invalid configurations because an
administrator must manually enable the port.
◆ Before enabling BPDU Guard, the interface must first be configured as
an edge port with the stp port edge command.
EXAMPLE
STP>bpduguard enable
STP>
stp recovery This command displays or sets edge port error recovery timeout.
SYNTAX
stp recovery [timeout]
timeout - The time that has to pass before a port in the error-
disabled state can be enabled. (Range: 30-86400 seconds, 0 to
disable the timeout)
DEFAULT SETTING
Disabled
COMMAND USAGE
This command controls whether a port in the error-disabled state will be
automatically enabled after a certain time. If recovery is not enabled, ports
have to be disabled and re-enabled for normal STA operation. The
condition is also cleared by a system reboot.
EXAMPLE
STP>recovery 30
STP>
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