Loop Guard - ZyXEL Communications GS1350 Series User Manual

The following table describes the labels in this screen.
Table 174 Switching > Link Aggregation > Link Aggregation Control Protocol
LABEL
Link
Aggregation
Control
Protocol
Active
System Priority
Group ID
LACP Active
Port
*
LACP Timeout
Apply
Cancel

49.6 Loop Guard

This section shows you how to configure the Switch to guard against loops on the edge of your network.
Loop guard allows you to configure the Switch to shut down a port if it detects that packets sent out on
that port loop back to the Switch. While you can use Spanning Tree Protocol (STP) to prevent loops in the
core of your network. STP cannot prevent loops that occur on the edge of your network.
Chapter 49 Switching
DESCRIPTION
Note: Do NOT configure this screen unless you want to enable dynamic link
aggregation.
Set this switch to ON to enable Link Aggregation Control Protocol (LACP).
LACP system priority is a number between 1 and 65,535. The switch with the lowest system priority
(and lowest port number if system priority is the same) becomes the LACP "server". The LACP
"server" controls the operation of LACP setup. Enter a number to set the priority of an active port
using Link Aggregation Control Protocol (LACP). The smaller the number, the higher the priority
level.
The field identifies the link aggregation group, that is, one logical link containing multiple ports.
Select this option to enable LACP for a trunk.
This field displays the port number.
Settings in this row apply to all ports.
Use this row only if you want to make some settings the same for all ports. Use this row first to set
the common settings and then make adjustments on a port-by-port basis.
Note: Changes in this row are copied to all the ports as soon as you make them.
Timeout is the time interval between the individual port exchanges of LACP packets in order to
check that the peer port in the trunk group is still up. If a port does not respond after three tries,
then it is deemed to be "down" and is removed from the trunk. Set a short timeout (one second)
for busy trunked links to ensure that disabled ports are removed from the trunk group as soon as
possible.
Select either 1 second or 30 seconds.
Click Apply to save your changes to the Switch's run-time memory. The Switch loses these
changes if it is turned off or loses power, so use the Save link on the top navigation panel to save
your changes to the non-volatile memory when you are done configuring.
Click Cancel to begin configuring this screen afresh.
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