36 PowerConnect B-Series FCX Web Management Interface User Guide
53-1002268-01
Monitoring RSTP
3
Monitoring RSTP
The Rapid Spanning Tree Protocol (RSTP 802.1W) feature provides rapid traffic reconvergence for
point-to-point links within a few milliseconds (0 – 500 milliseconds), following the failure of a bridge
or bridge port. This reconvergence occurs more rapidly than the reconvergence provided by the
802.1D Spanning Tree Protocol (STP)) or by RSTP Draft 3.
Configure RSTP before you view current RSTP information for a stack unit. For more information on
how to configure RSTP, refer to “Configuring the RSTP bridge” on page 126.
After configuring RSTP select Monitor > RSTP to view the bridge and port details. Select stack unit
ID from the drop-down list, and click Display. The following information appears.
Forward Transition The number of times STP has changed the state of this port between BLOCKING
and FORWARDING.
Cost The cost to the root bridge as advertised by the designated bridge that is
connected to this port. If the designated bridge is the root bridge itself, then the
cost is 0. The identity of the designated bridge is shown in the Design Bridge
field.
Design Root The root bridge as recognized on this port. The value is the same as the root
bridge ID listed in the Root ID field.
Design Bridge The designated bridge to which this port is connected. The designated bridge is
the device that connects the network segment on the port to the root bridge.
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