Siemens RUGGEDCOM ROS User Manual page 167

RUGGEDCOM ROS
User Guide
10
Figure 97: Port RSTP Parameters Form
1. Port(s) Box
8. Restricted Role Box
List
3. Configure the following parameter(s) as required:
Parameter
Port(s)
Enabled
Priority
STP Cost
RSTP Cost
Configuring STP for Specific Ethernet Ports
2. Enabled Options 3. Priority List
9. Restricted TCN Box
Description
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).
Synopsis: { Disabled, Enabled }
Default: Enabled
Enabling STP activates the STP or RSTP protocol for this port per the configuration in
the STP Configuration menu. STP may be disabled for the port ONLY if the port does
not attach to an STP enabled bridge in any way. Failure to meet this requirement WILL
result in an undetectable traffic loop in the network. A better alternative to disabling the
port is to leave STP enabled but to configure the port as an edge port. A good candidate
for disabling STP would be a port that services only a single host computer.
Synopsis: { 0, 16, 32, 48, 64, 80, 96, 112, 128, 144, 160, 176, 194, 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.
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.
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
4. STP Cost Box 5. RSTP Cost Box
10. Apply Button 11. Reload Button
Setup and Configuration
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6. Edge Port List 7. Point to Point
Chapter 5
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