RUGGEDCOM ROS
User Guide
Chapter 5
Setup and Configuration
Configuring an MSTI for an Ethernet Port
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Figure 105: Port MSTI Parameters Form
1.
Instance ID Box
2.
Get Button
3.
Port(s) Box
4.
Priority List
5.
STP Cost Box
6.
RSTP Cost Box
7.
Apply Button
8.
Reload Button
3. Under
Instance ID
, type an ID number for a Multiple Spanning Tree Instance (MSTI) and click
GET
. The
settings for the MSTI are displayed. Any changes made to the configuration will be applied specifically to this
instance ID.
4. Configure the following parameter(s) as required:
Parameter
Description
Port(s)
Synopsis:
Any combination of numbers valid for this parameter
The port number as seen on the front plate silkscreen of the
switch (or a list of ports, if aggregated in a port trunk).
Priority
Synopsis:
{ 0, 16, 32, 48, 64, 80, 96, 112, 128, 144, 160, 176,
192, 208, 224, 240 }
Default:
128
Selects 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.
STP Cost
Synopsis:
0 to 65535 or { Auto }
Default:
Auto
Selects 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 (4 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.
RSTP Cost
Synopsis:
0 to 2147483647 or { Auto }
Default:
Auto
Selects 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
