Spanning Tree - Planet sgsw-2620 User Manual

5.4.8 Spanning Tree

The Spanning Tree Protocol (STP) is a standardized method (IEEE 802.1D) for avoiding loops in Ethernet
networks. And, 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. When enable STP/RSTP function,
please ensure only one path at a time is active between any two nodes on the network. We can enable
STP/RSTP from the Switch setting advanced item of web interface. We are recommended you to enable
STP/RSTP on whole Switches for ensures a single active path in the network. The screen in
appears.
System Configuration:
This function provides view the Spanning tree Root Bridge information and Spanning tree status. The screen in
Figure 5-37 appears. Table 5-9 describes the Spanning Tree objects of switch.
OObject
RSTP Mode
Allow choose Disable. 802.1d and 802.1w mode. Default mode is Disable.
Priority
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 change the value, must reboot the switch assign path
priority number. The value must be multiple of 4096 according to the protocol standard rule.
Max Age
The number of seconds a bridge waits without receiving Spanning-Tree Protocol configura-
tion messages before attempting a reconfiguration. Enter a value between 6 through 40.
Hello Time
The time that controls switch sends out the BPDU packet to check STP current status. Enter
a value between 1 through 10.
The number of seconds a port waits before changing from its Spanning-Tree Protocol
Forward Delay
learning and listening states to the forwarding state. Enter a value between 4 through 30.
Time
Table 5-9 Descriptions of the SGSW-2620 Spanning Tree System Configuration Web Page screen Objects
After setup completed, please click "Apply" button to take effect.
@
Notice: please follow the 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)
Figure 5-37 SGSW-2620 Spanning Tree Parameters Web Page screen
Description
Figure 5-37
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