ZyXEL Communications ES3500 Series 27.2 Loop Guard Setup, Port, Active, Active, Loop Guard, Section 8.7 on page, Advanced Application, port via the loop guard feature

Chapter 27 Loop Guard

Note: After resolving the loop problem on your network you can re-activate the disabled port via the web configurator (see Section 8.7 on page 93) or via commands (see the Ethernet Switch CLI Reference Guide).

27.2 Loop Guard Setup

Click Advanced Application > Loop Guard in the navigation panel to display the screen as shown.

Note: The loop guard feature can not be enabled on the ports that have Spanning Tree Protocol (RSTP, MRSTP or MSTP) enabled.

Figure 133 Advanced Application > Loop Guard

The following table describes the labels in this screen.

Table 93 Advanced Application > Loop Guard

LABEL	DESCRIPTION
Active	Select this option to enable loop guard on the Switch.
	The Switch generates syslog, internal log messages as well as SNMP traps when it shuts down a
	port via the loop guard feature.
Port	This field displays a port number.
*	Use this row to make the setting the same for all ports. Use this row first 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 Switch 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 Switch will shut down this port.
	Clear this check box to disable the loop guard feature.

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	ES3500 Series User’s Guide