B&B Electronics EIR618-2SFP-T - Manual (Page 92)

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Manual Documentation Number: EIR618-2SFP-T_5107m
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
B&B Electronics – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445 – www.bb-europe.com
Rapid Spanning Tree
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.
RSTP - System Configuration
„ After modification, click Apply
¾ RSTP mode: Enable or disable the RSTP.
¾ 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
value must be multiple of 4096.
¾ 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
¾ Hello Time (1-10): The time that controls when, the switch sends
out the BPDU packet to check RSTP status. Enter a value between
1 and 10.
¾ Forward Delay Time (4-30): the number of seconds a port waits
before changing from its Rapid Spanning Tree Protocol learning
and listening state to the forwarding state. Enter a value between 4
and 30.
[NOTE]
Follow this 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)