ZyXEL Communications GS1350 Series User Manual page 350

Loop Guard – Probe Packet
Fig ure 257
The Switch also shuts down port
words loop guard also protects against standard network loops.
The following figure illustrates three switches forming a loop. A sample path of the loop guard probe
packet is also shown. In this example, the probe packet is sent from port
As long as loop guard is enabled on port
packet has returned to the Switch.
Loop Guard – Network Loop
Fig ure 258
Note: After resolving the loop problem on your network you can re-activate the disabled port
via the Web Configurator or via commands (See the CLI Reference Guide).
Click >
Switc hing L o o p G ua rd
Note: The loop guard feature cannot be enabled on the ports that have Spanning Tree
Protocol (RSTP) enabled.
Switching > Loop Guard
Fig ure 259
if the probe packet returns to switch
N
. The Switch will shut down port
N
in the navigation panel to display the screen as shown.
GS1350 Series User's Guide
350
on any other port. In other
A
and returns on another port.
N
if it detects that the probe
N