Hirschmann GREYHOUND GRS1020, Справочное руководство

Страница: 513 / 619

Redundancy
12.4 The Rapid Spanning Tree Protocol
173
UM Config GRS
Release 8.0 09/2019

TCN Guard – for ports that receive STP-BPDUs with a Topology Change flag
You activate this protection function separately for every device port.
If the protection function is activated, then the device ignores Topology Change flags in received
STP-BPDUs. This does not change the content of the address table (FDB) of the device port.
However, additional information in the BPDU that changes the topology is processed by the
device.

Loop Guard – for root, alternate and backup ports
You activate this protection function separately for every device port.
If the port does not receive any more STP-BPDUs, then this protection function helps prevent
the transmission status of a port from unintentionally being changed to forwarding . If this
situation occurs, then the device designates the loop status of the port as inconsistent, but does
not forward any data packets.
Activating the BPDU Guard

Open the Switching > L2-Redundancy > Spanning Tree > Global dialog.

Mark the BPDU guard checkbox.

To save the changes temporarily, click the button.
enable
Change to the Privileged EXEC mode.
configure
Change to the Configuration mode.
spanning-tree bpdu-guard
Activates the BPDU Guard.
show spanning-tree global
Displays the parameters for checking.
Hacker