ZyXEL Communications OLT2406, User Manual

Page: 249 / 766

Chapter 28 Loop Guard
OLT2406 User’s Guide
249
The following table describes the labels in this screen.
28.3 Loop Guard Status
Use this screen to view which ports have loop guard enabled as well as their status.
Click Advanced Application > Loop Guard > Loop Guard Status in the navigation panel to display the
screen as shown.
Table 93 Advanced Application > Loop Guard
LABEL DESCRIPTION
Active Select this option to enable loop guard on the OLT.
The OLT generates syslog, internal log messages as well as SNMP traps when it shuts down a port
via the loop guard feature.
Detection Time Specify the time interval (from 1 to 60 seconds) that the OLT waits before shutting down a port in
a loop state.The registered ONT connected to the shut-down port will remain registered.
You can also leave this field empty, and the OLT will shut down a port in a loop state
immediately.
You can go to the Advanced Application > Errdisable > Errdisable Recovery screen to configure
the time interval at which the OLT enables the shut-down port automatically when it’s no longer
in a loop state.
If error-disable recovery is not enabled, you can go to the Basic Setting > Port Setup screen to
enable the shut-down port.
Port This field displays the port number. * means all ports.
* 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.
Active Select this check box to enable the loop guard feature on this port. The OLT sends probe
packets from this port to check if the switch it is connected to is in loop state. If the switch that
this port is connected is in loop state the OLT will shut down this port.
Clear this check box to disable the loop guard feature.
Vid Specify the ID number of the VLAN to which the loop guard detection packets will be sent.
Apply Click Apply to save your changes to the OLT’s run-time memory. The OLT 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.
Cancel Click Cancel to begin configuring this screen afresh.