TP-Link T2500-28TCTL-SL5428E T2500-28TCUN V1 User Guide - Page 112

Spanning Tree, STP Config, Global Config, Parameters Config, Version, CIST Priority, Hello Time

Page 112 highlights

Choose the menu Spanning Tree→STP Config→STP Config to load the following page. Figure 7-4 STP Config The following entries are displayed on this screen:  Global Config STP: Enable/Disable STP function globally on the switch. Version: Select the desired STP version on the switch.  STP: Spanning Tree Protocol.  RSTP: Rapid Spanning Tree Protocol.  MSTP: Multiple Spanning Tree Protocol.  Parameters Config CIST Priority: Enter a value from 0 to 61440 to specify the priority of the switch for comparison in the CIST. CIST priority is an important criterion on determining the root bridge. In the same condition, the switch with the highest priority will be chosen as the root bridge. The lower value has the higher priority. The default value is 32768 and should be exact divisor of 4096. Hello Time Enter a value from 1 to 10 in seconds to specify the interval to send BPDU packets. It is used to test the links. 2*(Hello Time + 1) ≤ Max Age. The default value is 2 seconds. Max Age: Enter a value from 6 to 40 in seconds to specify the maximum time the switch can wait without receiving a BPDU before attempting to reconfigure. The default value is 20 seconds. Forward Delay: Enter a value from 4 to 30 in seconds to specify the time for the port to transit its state after the network topology is changed. 2*(Forward Delay-1) ≥ Max Age. The default value is 15 seconds. TxHoldCount: Enter a value from 1 to 20 to set the maximum number of BPDU packets transmitted per Hello Time interval. The default value is 5pps. Max Hops: Enter a value from 1 to 40 to set the maximum number of hops that occur in a specific region before the BPDU is discarded. The default value is 20 hops. 102

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102
Choose the menu
Spanning Tree
STP Config
STP Config
to load the following page.
Figure 7-4 STP Config
The following entries are displayed on this screen:
Global Config
STP:
Enable/Disable STP function globally on the switch.
Version:
Select the desired STP version on the switch.
STP:
Spanning Tree Protocol.
RSTP:
Rapid Spanning Tree Protocol.
MSTP:
Multiple Spanning Tree Protocol.
Parameters Config
CIST Priority:
Enter a value from 0 to 61440 to specify the priority of the switch for
comparison in the CIST. CIST priority is an important criterion on
determining the root bridge. In the same condition, the switch with the
highest priority will be chosen as the root bridge. The lower value has
the higher priority. The default value is 32768 and should be exact
divisor of 4096.
Hello Time
Enter a value from 1 to 10 in seconds to specify the interval to send
BPDU packets. It is used to test the links. 2*(Hello Time + 1) ≤ Max
Age. The default value is 2 seconds.
Max Age:
Enter a value from 6 to 40 in seconds to specify the maximum time the
switch can wait without receiving a BPDU before attempting to
reconfigure. The default value is 20 seconds.
Forward Delay:
Enter a value from 4 to 30 in seconds to specify the time for the port to
transit its state after the network topology is changed. 2*(Forward
Delay-1)
≥ Max Age. The default value is 15 seconds.
TxHoldCount:
Enter a value from 1 to 20 to set the maximum number of BPDU
packets transmitted per Hello Time interval. The default value is 5pps.
Max Hops:
Enter a value from 1 to 40 to set the maximum number of hops that
occur in a specific region before the BPDU is discarded. The default
value is 20 hops.