Configuring The Mst Region Identifier - Siemens RUGGEDCOM ROS v4.3 User Manual

Chapter 5
Setup and Configuration
Parameter
Cost
Desig Bridge ID
Section 5.2.9.3

Configuring the MST Region Identifier

Configuring the region identifier and revision level puts the MSTP bridge in a defined group. Other bridges that
have the same identifier and revision level are interconnected within this region. For more information, refer to
Section 5.2.3.1, "MSTP Regions and Interoperability"
To configure the Multiple Spanning Tree (MST) region identifier, do the following:
1. Navigate to Spanning Tree » Configure MST Region Identifier . The MST Region Identifier form appears.
4
Figure 102: MST Region Identifier Form
1. Name Box 2. Revision Level Box 3. Digest Box 4. Apply Button 5. Reload Button
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Description
Role of this port in Spanning Tree. This may be one of the following:
• Designated - The port is designated for (i.e. carries traffic towards
the root for) the LAN it is connected to.
• Root - The single port on the bridge, which provides connectivity
towards the root bridge.
• Backup - The port is attached to a LAN that is serviced by another
port on the bridge. It is not used but is standing by.
• Alternate - The port is attached to a bridge that provides
connectivity to the root bridge. It is not used but is standing by.
• Master - Only exists in MSTP. The port is an MST region boundary
port and the single port on the bridge, which provides connectivity
for the Multiple Spanning Tree Instance towards the Common
Spanning Tree root bridge (i.e. this port is the root port for the
Common Spanning Tree Instance).
Synopsis: 0 to 4294967295
Cost offered by this port. If the Bridge RSTP Parameters Cost Style
is set to STP, 1Gbps ports will contribute 4, 100 Mbps ports will
contribute 19 and 10 Mbps ports contribute a cost of 100. If the Cost
Style is set to RSTP, 1Gbps will contribute 20,000, 100 Mbps ports
will contribute a cost of 200,000 and 10 Mbps ports contribute a
cost of 2,000,000. Note that even if the Cost style is set to RSTP, a
port that migrates to STP will have its cost limited to a maximum of
65535.
Synopsis: $$ / ##-##-##-##-##-## where $$ is 0 to 65535, ## is 0
to FF
Provided on the root ports of designated bridges, the Bridge
Identifier of the bridge this port is connected to.
.
RUGGEDCOM ROS
User Guide
Configuring the MST Region Identifier
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