Loop-Protection Loop-Detect - Allied Telesis IE220 Series Manual

S C
WITCHING OMMANDS
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LOOP PROTECTION LOOP DETECT

loop-protection loop-detect

Overview Use this command to enable the loop-protection loop-detect feature and
configure its parameters.
Use the no variant of this command to disable the loop-protection loop-detect
feature.
Syntax loop-protection loop-detect [ldf-interval <period>]
[ldf-rx-window <frames>] [fast-block]
no loop-protection loop-detect
Default The loop-protection loop-detect feature is disabled by default. The default interval
is 10 seconds, and the default window size is 3 frames.
Mode Global Configuration
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:
•
•
The
instances (one instance per VLAN per port) and the number of packets that need
C613-50644-01 Rev B
Parameter
ldf-interval
<period>
ldf-rx-window
<frames>
fast-block
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.
show loop-protection
Command Reference for IE220 Series
AlliedWare Plus™ Operating System - Version 5.5.3-0.x
Description
The time (in seconds) between successive loop-detect frames
being sent.
Specify a period between 1 and 600 seconds. The default is 10
seconds.
The number of transmitted loop detect frames whose details
are held for comparing with frames arriving at the same port.
Specify a value for the window size between 1 and 5 frames.
The default is 3 frames.
The fast-block blocks transmitting port to keep partial
connectivity.
command shows the total number of loop-protection
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