Korenix JetNet 4000, Руководство пользователя

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Web-based Management
Korenix JetNet Series Industrial Web-Managed Ethernet Rail Switch User’s Manual 3-17
RSTP
The Spanning Tree Protocol (STP) is a standardized method (IEEE 802.1d) for avoiding loops in
networks connected with switches. The Rapid Spanning Tree Protocol (RSTP) is the evolution of
the Spanning Tree Protocol, and provides faster spanning tree convergence after a topology
change. JetNets support both STP and RSTP.
System Configuration
Under System Configuration, you can see Root Bridge Information. You also can change
Spanning Tree settings here.
RSTP Mode : you must enable STP or RSTP function before configuring any related parameters.
The settings of the STP- or RSTP-related parameters are the same. 802.1d = STP mode.
802.1w = RSTP mode.
Priority (0-61440) : this value is used to identify the root bridge. The bridge with the lowest value
has the highest priority, and is selected as the root. If you change the value, you must reboot the
JetNet to assign a path priority number. The value must be multiples of 4096 according to
standard rule of the protocol.
Max Age (6-40) : this value is the number of seconds that 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) : this value is the time which controls the JetNet to send out the BPDU packet
to check STP current status. Enter a value between 1 and 10.
Forward Delay Time (4-30) : this value is the number of seconds that a port waits before
changing its Spanning Tree Protocol learning and listening states to the forwarding state. Enter a
value between 4 and 30.
Once you finish configuring the settings, click on Apply to save the configuration.
Note : You must follow the rule set below to configure the Max Age, Hello Time, and Forward
Delay Time.
2 × (Forward Delay Time value
－
1)
≧
Max Age value
≧
2×(Hello Time value
＋
1)