Hirschmann GREYHOUND GRS1020, Справочное руководство

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Redundancy
12.4 The Rapid Spanning Tree Protocol
175
UM Config GRS
Release 8.0 09/2019
Activating Root Guard / TCN Guard / Loop Guard

Open the Switching > L2-Redundancy > Spanning Tree > Port dialog.

Switch to the Guards tab.

For designated ports, select the checkbox in the Root guard column.

For ports that receive STP-BPDUs with a Topology Change flag, select the checkbox in
the TCN guard column.

For root, alternate or backup ports, mark the checkbox in the Loop guard column.
Note: The Root guard and Loop guard functions are mutually exclusive. If you try to activate the
Root guard function while the Loop guard function is active, then the device deactivates the Loop
guard function.

To save the changes temporarily, click the button.
enable Change to the Privileged EXEC mode.
configure Change to the Configuration mode.
interface <x/y> Change to the interface configuration mode of
interface
<x/y>
.
spanning-tree guard-root Switches the Root Guard on at the designated port.
spanning-tree guard-tcn Switches the TCN Guard on at the port that
receives STP-BPDUs with a Topology Change
flag.
spanning-tree guard-loop Switches the Loop Guard on at a root, alternate or
backup port.
exit Leaves the interface mode.
show spanning-tree port x/y Displays the parameters of the port for checking.