Wavetronix Click 342 (lean managed ethernet switch) (CLK-342) - Managed Switches User Guide - Manual (Page 60)

CHAPTER 6 • RAPID SPANNING TREE 59
˽ Designated Cost – Indicates the path costs of this segment to the root switch.
As with STP, a device is also selected as the root for RSTP and every port is assigned a
role according to its participation within the topology.
˽ Port States – The number of port states is also reduced in RSTP. Only the Forwarding,
Discarding and Learning states are still available if the network is operated in mixed
operation of STP and RSTP.
Due to the fast switch-over times of RSTP, frames may be duplicated and the order of frames
may be changed.
Enabling RSTP with Serial Interface
Establish a connection to the switch as described in Chapter 5. Set Spanning Tree, enabled
on the following page in the Redundancy field and select Save (see Figure 6.6).
Figure 6.6 – Activating Spanning Tree
Having activated (Rapid) Spanning Tree for all switches, you can create a meshed topology
with redundant data paths. Any data connections can now be created without taking loops
into consideration. Loops can even be added on purpose in order to create redundant con-
nections.
A data path between Spanning Tree switches can be one of following connections:
˽ A direct connection.
˽ A connection via one or more additional switches that do not support Spanning Tree.
Note
If Spanning Tree is not supported by all of the switches used, the reconfiguration
time for Spanning tree is extended by the aging time of switches without Spanning
Tree support.
˽ A connection via one or more additional hubs that do not support Spanning Tree.