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Defaults
None.
Mode
Switch command, read‐write.
Example
This example shows how to reset the Loop Protect event notification state to the default of
disabled.
C2(rw)->clear spantree lptrapenable
set spantree disputedbpduthreshold
Use this command to set the disputed BPDU threshold, which is the number of disputed BPDUs
that must be received on a given port/SID until a disputed BPDU trap is sent.
Syntax
set spantree disputedbpduthreshold value
Parameters
value
Defaults
None.
Mode
Switch command, read‐write.
Usage
A disputed BPDU is one in which the flags field indicates a designated role and learning, and the
priority vector is worse than that already held by the port. If a disputed BPDU is received the port
is forced to the listening state. Refer to the 802.1Q‐2005 standard, IEEE Standard for Local and
Metropolitan Area Networks – Virtual Bridged Local Area Networks, for a full description of the dispute
mechanism, which prevents looping in cases of one‐way communication.
The disputed BPDU threshold is an integer variable that represents the number of disputed
BPDUs that must be received on a given port/SID until a disputed BPDU trap is sent and a syslog
message is issued. For example, if the threshold is 10, then a trap is issued when 10, 20, 30, and so
on, disputed BPDUs have been received.
If the value is 0, traps are not sent. The trap indicates port, SID and total Disputed BPDU count.
The default is 0.
Specifies the number of disputed BPDUs that must be received on a
given port/SID to cause a disputed BPDU trap to be sent.
A threshold of 0 indicates that traps should not be sent. The default
value is 0.
set spantree disputedbpduthreshold
SecureStack C2 Configuration Guide 9-51
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