B&B Electronics EIR618-2SFP-T - Manual - Manual (Page 94)

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Manual Documentation Number: EIR618-2SFP-T_4812m
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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.
RSTP - System Configuration
 The user can view spanning tree information of Root Bridge.
 The user can modify RSTP state. After modification, click
Apply
button.
 RSTP mode: The user must enable the RSTP function first before
configuring the related parameters.
 Priority (0-61440): 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 (6-40): 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 (1-10): 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 (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.
[NOTE] Follow the rule as below to configure the MAX Age, Hello Time,
and Forward Delay Time.
2 x (Forward Delay Time value
–1) > = Max Age value >= 2 x
(Hello Time value +1)