Enterasys G3G170-24, Cli Reference Manual

Page: 269 / 679

show spantree disputedbpduthreshold
Enterasys G-Series CLI Reference 6-49
Syntax
set spantree disputedbpduthreshold value
Parameters
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.
Example
This example shows how to set the disputed BPDU threshold value to 5:
G3(rw)->set spantree disputedbpduthreshold 5
show spantree disputedbpduthreshold
Use this command to display the current value of the disputed BPDU threshold.
Syntax
show spantree disputedbpduthreshold
Parameters
None.
Defaults
None.
value 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.