Managing Multiple Spanning Tree Instances Globally - Siemens RUGGEDCOM ROX II User Manual

Chapter 5
Setup and Configuration
Parameter
rstp-priority { rstp-priority }
stp-cost { stp-cost }
rstp-cost { rstp-cost }
4. If necessary, add Multiple Spanning Tree Instances (MSTI). For more information, refer to
"Adding a Multiple Spanning Tree
Type commit and press Enter to save the changes, or type revert and press Enter to abort.
5.
Section 5.36.6

Managing Multiple Spanning Tree Instances Globally

MSTP (Multiple Spanning Tree Protocol), as defined by the IEEE 802.1 standard, maps multiple VLANs to a
single Spanning Tree instance, otherwise referred to as a Multiple Spanning Tree Instance (MSTI).
Each MSTI is assigned an MST ID and a bridge priority:
• The MST ID is used to associate the MSTI with a VLAN.
• The bridge priority is used by all devices in the Spanning Tree topology to determine which device among
them is elected the root device or backbone. An ideal root device is one that is central to the network and not
connected to end devices.
For more information about MSTP, refer to
The following sections describe how to configure and manage Multiple Spanning Tree Instances:
530
Description
If TRUE, causes the port not to propagate received topology
change notifications and topology changes to other ports. This
parameter should be FALSE by default. If set, it can cause a
temporary loss of connectivity after changes in a spanning tree's
active topology as a result of persistent, incorrectly learned
station location information.
Synopsis: { 16, 32, 64, 96, 112, 128, 144, 160, 176, 192, 208,
224, 240 }
Default: 128
The STP port priority. Ports of the same cost that attach to a
common LAN will select the port to be used based upon the port
priority.
Synopsis: { auto-cost } or an integer between 0 and 65535
Default: auto-cost
The cost to use in cost calculations, when the cost style
parameter is set to STP in the bridge RSTP parameters
configuration. Setting the cost manually provides the ability to
preferentially select specific ports to carry traffic over others.
Leave this field set to 'auto' to use the standard STP port costs
as negotiated (four for 1Gbps, 19 for 100 Mbps links and 100 for
10 Mbps links). For MSTP, this parameter applies to both external
and internal path cost.
Synopsis: { auto-cost } or an integer between 0 and
2147483647
Default: auto-cost
The cost to use in cost calculations, when the cost style
parameter is set to RSTP in the bridge RSTP parameters
configuration. Setting the cost manually provides the ability to
preferentially select specific ports to carry traffic over others.
Leave this field set to 'auto' to use the standard RSTP port costs
as negotiated (20,000 for 1Gbps, 200,000 for 100 Mbps links and
2,000,000 for 10 Mbps links). For MSTP, this parameter applies
to both external and internal path costs.
Instance".
Section 5.36.3, "MSTP Operation".
Managing Multiple Spanning Tree Instances Globally
RUGGEDCOM ROX II
CLI User Guide
Section 5.36.6.3,