Lantech 2204F Series, User Manual

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5.18 Spanning Tree
The Rapid Spanning Tree Protocol (RSTP) is an evolution of the Spanning Tree Protocol
and provides for 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.
6.18.1 RSTP Setting
This web page provides the port configuration interface for RSTP. You can assign
higher or lower priority to each port. Rapid spanning tree will have the port with the
higher priority in forwarding state and block other ports to make certain that there is no
loop in the LAN.

RSTP mode: The user must enable the RSTP function first before configuring
the related parameters.

Priority : The switch with the lowest value has the highest priority and is
selected as the root. If the value is changed, the user must reboot the switch.
The value must be a multiple of 4096 according to the protocol standard rule.

Max Age : The number of seconds a switch waits without receiving Spanning-
tree Protocol configuration messages before attempting a reconfiguration. Enter
a value between 6 through 40.

Hello Time : The time that controls the switch to send out the BPDU packet to
check RSTP current status. Enter a value between 1 through 10.

Forward Delay Time : 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 between 4 through 30.

Enable: Select the port which you want to be enabled with RSTP.

Path Cost: The cost of the path to the other bridge from this transmitting bridge at
the specified port. Enter a number 1 through 200,000,000.

Priority: Decide which port should be blocked by setting its priority as the lowest.
Enter a number between 0 and 240. The value of priority must be the multiple of 16.

P2P: The rapid state transitions possible within RSTP are dependent upon whether