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RUGGEDCOM ROX II

CLI User Guide

Chapter 14

Network Redundancy

Implementing MSTP on a Bridged Network 641

Compatibility with STP and RSTP

No special configuration is required for the bridges of an MST region to connect fully and simply to non-MST

bridges on the same bridged network. Careful planning and configuration is, however, recommended to arrive at

an optimal network design.

Section14.3.3.4

Implementing MSTP on a Bridged Network

The following procedure is recommended for configuring MSTP on a network. Beginning with a set of MSTP-

capable Ethernet bridges, do the following for each bridge on the network:

NOTE

Careful network analysis and planning should inform each step of creating an MSTP network.

NOTE

MSTP does not need to be enabled to map a VLAN to an MSTI. However, the mapping must be identical

for each bridge that belongs to the MSTP region.

1. Disable STP. For more information, refer to Section14.3.4, “Configuring STP Globally”.

2. Configure one or more Multiple Spanning Tree Instances (MSTI), each with a unique bridge priority. For more

information, refer to Section14.3.6.3, “Adding a Multiple Spanning Tree Instance”.

3. Create static VLANs and map them to the MSTIs. For more information, refer to Section8.5.5.2, “Adding a

Static VLAN”.

4. Configure individual MSTI for each switched Ethernet port and/or Ethernet trunk interface that will transmit/

receive MST BPDU (Bridge Protocol Data Unit) traffic. For more information, refer to Section14.3.7,

“Managing Multiple Spanning Tree Instances Per-Port”.

5. Set the STP protocol version to MSTP, configure the MST region identifier and revision level, and then enable

STP. For more information, refer to Section14.3.4, “Configuring STP Globally”.

Section14.3.4

Configuring STP Globally

To configure global settings for the Spanning Tree Protocol (STP), do the following:

1. Make sure the CLI is in Configuration mode.

2. Navigate to switch» spanning-tree.

3. Configure the basic STP settings by configuring the following parameter(s):

Parameter Description

enabled Synopsis:  { true, false }

Default:  true

Enables STP/RSTP/MSTP for the bridge globally. Note that STP/RSTP/MSTP is enabled on a

port when it is enabled globally and along with enabling per port setting.

version { version } Synopsis:  { stp, rstp, mstp }

Default:  rstp

Siemens RUGGEDCOM ROX II User Manual

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