B&B Electronics EIR508-T - Manual - Manual (Page 48)

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Manual Documentation Number: EIR508-2xx-T 1713m
B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104 – www.bb-elec.com
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RSTP Configuration
The Rapid Spanning Tree Protocol (RSTP) is an evolution of Spanning Tree
Protocol (STP). It provides a faster spanning tree convergence after a
topology change. The switch will auto detect a device that is running STP or
RSTP protocol.
System Configuration
 Modify RSTP state.
 RSTP mode: Enable or disable RSTP function.
 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, the switch must be rebooted. The
priority 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 and 40
 Hello Time (1-10): The time that the control switch sends out a
BPDU packet to check RSTP status. Enter a value between 1 and
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]
1. Use the following rule 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)
2. If the configuration is not saved it will be lost when the
switch is powered off.