Hirschmann GREYHOUND GRS1020, Reference Manual

Page: 510 / 619

Redundancy
12.4 The Rapid Spanning Tree Protocol
170
UM Config GRS
Release 8.0 09/2019
12.4.6 Configuring the device
RSTP configures the network topology completely independently. The device with the lowest
bridge priority automatically becomes the root bridge. However, to define a specific network
structure regardless, you specify a device as the root bridge. In general, a device in the backbone
takes on this role.

Set up the network to meet your requirements, initially without redundant lines.

You deactivate the flow control on the participating ports.
If the flow control and the redundancy function are active at the same time, it is possible that the
redundancy function operates differently than intended. (Default setting: flow control
deactivated globally and activated on every port.)

Disable MRP on every device.

Enable Spanning Tree on every device in the network.
In the state on delivery, Spanning Tree is switched on in the device.

Now connect the redundant lines.

Define the settings for the device that takes over the role of the root bridge.

Open the Switching > L2-Redundancy > Spanning Tree > Global dialog.

Enable the function.

To save the changes temporarily, click the button.
enable Change to the Privileged EXEC mode.
configure Change to the Configuration mode.
spanning-tree operation Enables Spanning Tree.
show spanning-tree global Displays the parameters for checking.

In the Priority field you enter a numerically lower value.
The bridge with the numerically lowest bridge ID has the highest priority and becomes the
root bridge of the network.

To save the changes temporarily, click the button.
spanning-tree mst priority 0 <0..61440
in 4096er
-
Schritten>
Specifies the bridge priority of the device.
After saving, the dialog shows the following information:
• The Bridge is root checkbox is marked.
• The Root port field shows the value 0.0 .
• The Root path cost field shows the value 0 .
show spanning-tree global
Displays the parameters for checking.

If applicable, then change the values in the Forward delay [s] and Max age fields.
– The root bridge transmits the changed values to the other devices.

To save the changes temporarily, click the button.