Wavetronix Click 342 (lean managed ethernet switch) (CLK-342) - Managed Switches User Guide - Manual (Page 57)

56 CHAPTER 6 • RAPID SPANNING TREE
of the next switch).
No additional switches/bridges are connected to edge ports. Termination devices are con-
nected to edge ports.
An alternate port is a path to the root that did not become a root port; therefore, this port
is not part of the active topology.
RSTP Configuration
Set the Rapid Spanning Tree status to Enable in order to start RSTP using default settings.
Priority values can be specified for the switch. The root and alternate ports can be specified
via these priority values (see Figure 6.4).
The desired value can simply be entered in the Priority field. Only multiples of 4096 are
permitted; the value will be rounded automatically to the next multiple of 4096. Once you
have confirmed the modification by entering your password, the initialization mechanism
is started. Redundant connections can now be created.
The Maximum Age of STP Information, Hello Time, and Forward Delay fields have the
same meaning as for STP. These values are used when this switch becomes a root. The values
currently used can be found under RSTP General.
Figure 6.4 – RSTP Configuration Web Page
˽ Maximum Age of STP Information – STP information Bridge Protocol Data Unit
(BPDU) is sent by the root switch at an age of “0” and at Hello Time intervals. If a
BPDU was received, every other switch sends its own configuration message via the
ports for which the switch itself is the designated switch. The age of the information
(BPDU) is increased by one second every time the information passes a switch.
˽ Hello Time – This value specifies the time interval within which the root bridge regu-
larly reports to the other bridges via BPDU.
˽ Forward Delay – The forward delay value indicates how long the switch is to wait in
order for the port state in STP mode to change from “Discarding” to “Listening” and
from “Listening” to “Learning” (2 x forward delay).
RSTP Port Table
All ports that do not receive any RSTP BPDUs become edge ports, i.e., ports that switch to