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Multiple Instance Spanning-Tree Operation
Loop Protection
Notes ■ The receiver-action option can be configured on a per-port basis and can
only be enabled after loop protection has been enabled on the port. All
other configuration options (disable-timer, trap loop-detected, and transmit
interval) are global.
■ The trap option refers to a SNMP trap.
■ Regardless of how the receiver-action and trap options are configured, all
detected loops will be logged in the switch’s event log.
■ The no loop-protect <port> command will not remove a receive-action
configuration line from the running configuration unless this option is set
to receive-action send-disable.
Viewing Loop Protection Status
To display information about ports with loop protection enabled, enter the
show loop-protect command.
For example:
Figure 4-30. Example of Show Loop-Protect Display
Syntax: show loop-protect <port-list>
Displays the loop protection status. If no ports are specified, the
information is displayed only for the ports that have loop protec-
tion enabled.
ProCurve(config)# show loop-protect 1-4
Status and Counters - Loop Protection Information
Transmit Interval (sec) : 5
Port Disable Timer (sec) : 5
Loop Detected Trap : Enabled
Loop Loop Loop Time Rx Port
Port Protection Detected Count Since Last Loop Action Status
---- ----------- --------- ---------- ---------------- ------------ --------
1 Yes No 0 send-disable Up
2 Yes No 0 send-disable Up
3 Yes No 0 send-disable Up
4 Yes No 0 send-disable Up