25. Spanning Tree
ROX™ v2.2 User Guide 252 RuggedBackbone™ RX5000
The cost to use in cost calculations, when the cost style parameter is set to STP in the bridge
RSTP parameter 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 costs.
RSTP Cost
Synopsis: string - the keyword { auto-cost }
Synopsis: unsigned integer
Default: auto-cost
The cost to use in cost calculations, when the cost style parameter is set to RSTP in the bridge
RSTP parameter 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.
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