RUGGEDCOM ROX II
User Guide
Chapter 5
Setup and Configuration
Configuring STP for Switched Ethernet Ports 709
Parameter Description
'TRUE' or RSTP is disabled, the port will be shut down for the time period specified by
this parameter.
• NO SHUTDOWN: BPDU Guard is disabled.
• UNTIL RESET: The port will remain shut down until the port reset command is issued
by the user.
• SPECIFY: A timeout period is specified for the port using the BPDU Timeout
parameter.
BPDU Timeout The time for which a port is shutdown. Only applicable when BPDU Guard Mode is set
to specify.
Fast Root Failover Synopsis: on, off, on-with-standard-root
Default: on
The Fast Root Failover algorithm. Options include:
• Off: The Fast Root Failover algorithm is disabled. As such, a root switch failure may
result in excessive connectivity recovery time in a mesh network.
• On: Fast Root Failover is enabled and the most robust algorithm is used, which
restores network connectivity quickly in case of root bridge failure in a mesh network.
• On with standard root: Fast Root Failover is enabled but a relaxed algorithm is used,
allowing the use of a standard switch in the root role.
IEEE802.1w Interoperability Default: true
Enables/disables IEEE 802.1w Interoperability
Cost Style Synopsis: stp, rstp
Default: stp
The style of link costs to employ. STP uses 16-bit path costs based upon 1x10E9/link
speed (4 for 1Gbps, 19 for 100 Mbps and 100 for 10 Mbps) whereas RSTP uses 32-
bit costs based upon 2x10E13/link speed (20,000 for 1Gbps, 200,000 for 100 Mbps
and 2,000,000 for 10 Mbps). Note that RSTP link costs are used only when the bridge
version support is set to allow RSTP and the port does not migrate to the Spanning Tree
Protocol (STP).
5. On the RSTP (Common) Instance form, configure the following parameters as required:
Parameter Description
Bridge Priority Synopsis: 4096, 8192, 12288, 16384, 20480, 24576, 28672, 32768, 36864, 40960,
45056, 49152, 53248, 57344, 61440
Default: 32768
The priority assigned to the RSTP/Common Bridge Instance.
6. If necessary, add Multiple Spanning Tree Instances (MSTI). For more information, refer to Section 5.34.8.3,
“Adding a Multiple Spanning Tree Instance”.
7. Click Commit to save the changes or click Revert All to abort. A confirmation dialog box appears. Click OK
to proceed.
8. Click Exit Transaction or continue making changes.
Section 5.34.6
Configuring STP for Switched Ethernet Ports
To configure the Spanning Tree Protocol (STP) for a switched Ethernet port, do the following:
1. Change the mode to Edit Private or Edit Exclusive.
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