EKI-7758F User Manual 118
C.3.2 Rapid 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.
• User can view spanning tree information about the Root Bridge.
• User can modify RSTP state. After modification, click ‘Apply’ button.
Bridge Configuration
• RSTP mode: user must enable or disable RSTP function before configure 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,
user must reboot the switch. The value must be multiple of 4096 according to the
protocol standard rule.
• Max Age (6-40): the number of seconds a bridge waits without receiving Spanning
Tree Protocol configuration messages before attempting a reconfiguration. Enter a
value between 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 between 1 through 10.
• Forward 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 between 4 through 30.
RSTP - Port Configuration
You can configure path cost and priority of every port.
• Select the port in Port column.
• Path Cost: The cost of the path to the other bridge from this transmitting bridge at
the specified port. Enter a number 1 through 200000000.
• Priority: Decide which port should be blocked by priority in LAN. Enter a number 0
through 240. The value of priority must be the multiple of 16.
• P2P: Some of the rapid state transactions that are possible within RSTP are
dependent upon whether the port concerned can only be connected to exactly one
other bridge (i.e. it is served by a point-to-point LAN segment), or can be connected
to two or more bridges (i.e. it is served by a shared medium LAN segment). This
function allows the P2P status of the link to be manipulated administratively. True
is P2P enabling. False is P2P disabling.
• Edge: The port directly connected to end stations cannot create bridging loop in the
network. To configure the port as an edge port, set the port to “True” status.
• Non Stp: The port includes the STP mathematic calculation. True is not including
STP mathematic calculation. False is including the STP mathematic calculation.
• Click ’Apply’.