INS_CNGE3FE7MS4_REV– Rev. 4.30.14 PAGE 43
INSTALLATION AND OPERATION MANUAL
CNGE3FE7MS4
TECH SUPPORT: 1.888.678.9427
RSTP
The Rapid Spanning Tree Protocol (RSTP) is an evolution of the Spanning Tree Protocol. It
provides faster spanning tree convergence after a topology change. The system also supports
STP and the system will auto detect the connected device that is running STP or RSTP protocol.
RSTP setting
You can enable/disable RSTP function, and set parameters for each port.
RSTP Setting interface
Label
Description
RSTP mode
You must enable or disable the RSTP function before
configuring the related parameters.
Priority (0-61440)
A value used to identify the root bridge. The bridge with
the lowest value has the highest priority and is selected
as the root. If the value changes, You must restart the
switch. The value must be a multiple of 4096 according
to the protocol standard rule.
Max Age Time(6-40)
The number of seconds a bridge waits without receiving
Spanning-tree Protocol configuration messages before
attempting a reconfiguration. Enter a value from 6
through 40.
Hello Time (1-10)
The time that controls switch sends out the BPDU packet
to check RSTP current status. Enter a value from 1
through 10.
Forwarding Delay Time
(4-30)
The number of seconds a port waits before changing
from its Rapid Spanning-Tree Protocol learning and
listening states to the forwarding state. Enter a value
from 4 through 30.
Apply
Select
Apply
to activate the configurations.
NOTE: Follow the rule to configure the MAX Age, Hello Time, and Forward Delay Time.
2
×
(Forward Delay Time value –1) ≥ Max Age value ≥ 2
×
(Hello Time value +1)
