Siemens RUGGEDCOM RX1510, Руководство пользователя

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RUGGEDCOM ROX II
User Guide
Chapter 5
Setup and Configuration
Configuring STP for Ethernet Trunk Interfaces 711
Parameter Description
detectable loop. The Edgeness of the port will be switched off and the standard RSTP
rules will apply (until the next link outage).
Admin Point-to-Point Synopsis: forceTrue, forceFalse, auto
Default: auto
RSTP uses a peer-to-peer protocol that provides for rapid transitioning on point-to-point
links. This protocol is automatically turned off in situations where multiple STP bridges
communicate over a shared (non point-to-point) LAN. The bridge will automatically take
point-to-point to be true when the link is found to be operating in full-duplex mode. The
point-to-point parameter allows this behavior or overrides it, forcing point-to-point to
be true or false. Force the parameter true when the port operates a point-to-point link
but cannot run the link in full-duplex mode. Force the parameter false when the port
operates the link in full-duplex mode, but is still not point-to-point (e.g. a full-duplex link
to an unmanaged bridge that concentrates two other STP bridges).
Restricted Role If enabled, causes the port not to be selected as the root port for the CIST or any MSTI,
even though it has the best spanning tree priority vector. This parameter should be
FALSE by default.
Restricted TCN 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.
RSTP Priority 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.
STP Cost Synopsis: auto-cost,
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.
RSTP Cost Synopsis: auto-cost,
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.
4. If necessary, add Multiple Spanning Tree Instances (MSTI). For more information, refer to Section 5.34.8.3,
“Adding a Multiple Spanning Tree Instance” .
5. Click Commit to save the changes or click Revert All to abort. A confirmation dialog box appears. Click OK
to proceed.
6. Click Exit Transaction or continue making changes.
Section 5.34.7
Configuring STP for Ethernet Trunk Interfaces
To configure the Spanning Tree Protocol (STP) for an Ethernet trunk interface, do the following: