ZyXEL Communications MES-2110 manual Snmp traps when it shuts down a port via the loop detection

Chapter 8 Loop Detection

The following table describes the labels in this screen.

Table 13 Configuration > Loop Detection

LABEL	DESCRIPTION
Protection	Select Enable or Disable to have the MES-2110 apply loop
	detection.
	The MES-2110 generates syslog, internal log messages as well as
	SNMP traps when it shuts down a port via the loop detection
	feature.
MAC Address	This is the MAC address of the probe frame sent by the MES-
	2110. You can configure the field as a unicast or multicast MAC
	address, depending on your needs.
	The default MAC address is a multicast address
	(01.01.02.02.03.03). Some network switch does not forward
	frames with unrecognized multicast MAC address. Test frames
	sent out for loop detection will be discarded by this type of switch.
	Users can configure a unicast MAC address to solve this problem.
Port	This is the port number.
Enable/Disable	Select Enable or Disable to have the MES-2110 apply loop
	detection feature on this port. When the loop detection feature is
	enabled, the MES-2110 sends probe frames 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 MES-2110 will shut
	down this port.
Block/Unblock	When the MES-2110 detects looping, the system sets the port to
	Block. Use this field to Unblock the port once you have manually
	fixed the loop.
Undo	Click this to restore your last saved settings.
Refresh	Click this to reset the data for the field(s).
Apply	Click Apply to save your changes to the ZyXEL Device’s run-time
	memory. The ZyXEL Device loses these changes if it is turned off
	or loses power, so use the Save Settings link in the navigation
	panel to save your changes to the non-volatile memory.

MES-2110 User’s Guide

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