C613-50631-01 Rev A Command Reference for IE340 Series 602
AlliedWare Plus™ Operating System - Version 5.5.3-0.x
SWITCHING COMMANDS
SHOW
LOOP-PROTECTION
show loop-protection
Overview Use this command to display the current configuration and operation of loop
protection on the device.
Syntax
show loop-protection [interface <port-list>] [counters]
Mode User Exec and Privileged Exec
Usage notes If transmitting of loop-detection frames takes too long, then it can time out and the
switch may not send all loop-detection frames, and therefore may not detect a
loop. This can happen in some networks with large numbers of loop-protection
instances with short loop-detection intervals. In this case, the switch generates a
log message:
“Sending loop-detection frames taking longer than expected - too many
instances?”
To prevent this log message, you can either:
• change the loop-detection frame interval to a higher value to reduce the
number of packets that are sent in each block. To do this, use the command
loop-protection loop-detect ldf-interval <period>, or
• reduce the number of instances by reducing the number of VLANs per port
or by removing loop protection from some ports.
The show loop-protection command shows the total number of loop-protection
instances (one instance per VLAN per port) and the number of packets that need
to be transmitted by the device each second (the Total Instances entry). It also
shows the number of packets that timed out for each port (the Timeout entry). The
show loop-protection counter command shows the number of timeouts per
VLAN for each port.
Example To display the current configuration status, use the command:
awplus# show loop-protection
Parameter Description
interface The interface selected for display.
<port-list> A port, a port range, or an aggregated link.
counters Displays counter information for loop protection.
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