Network structures
6.3 Spanning Tree
SCALANCE XM-400/XR-500 Command Line Interface (CLI)
250
Configuration Manual, 06/2016, C79000-G8976-C252-11
Further notes
You can configure the setting for the maximum number of nodes with the
spanning-tree mst
max-hops
command.
You display this setting and other information with the
show spanning tree mst
configuration
command.
6.3.4.8
spanning-tree mst instance-id root
Description
With this command you specify whether the device is a root bridge (primary) or a substitute
root bridge (secondary).
Requirement
You are in the Global Configuration mode.
The command prompt is as follows:
cli(config)#
Syntax
Call up the command with the following parameters:
spanning-tree mst{instance-id<instance-id(1-64)>}root{primary|secondary}
The parameters have the following meaning:
Parameter
Description
Range of values / note
instance-id
Keyword for the instance
-
instance-id
Number of the instance
1 ... 64
primary
The priority of the device is set to a low value so that the
device can become the root bridge (primary) of the
Spanning Tree instance. The lower the value, the higher
the priority.
The priority is set to the
value 24576.
secondary
The priority of the device is set to a low value so that the
device becomes the substitute root bridge (secondary)
of the Spanning Tree instance. If the root bridge (prima-
ry) fails, the substitute root bridge (secondary) takes
over the task of the root bridge without delay.
The priority is set to the
value 28672.
Result
The function of the device is specified.
Further notes
You disable the root bridge with the
no spanning-tree mst instance-id root
command.
You display this setting and other information with the commands that start with
show
spanning tree ...
.
Summary of Contents for SCALANCE XM-400
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