TP-Link JetStream T2700G-28TQ User Manual page 120

The following entries are displayed on this screen:
Global Config

Spanning Tree:
Mode:
Parameters Config

CIST Priority:
Hello Time
Max Age:
Forward Delay:
TxHoldCount:
Max Hops:
Note:
1. The forward delay parameter and the network diameter are correlated. A too small forward
delay parameter may result in temporary loops. A too large forward delay may cause a
network unable to resume the normal state in time. The default value is recommended.
2. An adequate hello time parameter can enable the switch to discover the link failures occurred
in the network without occupying too much network resources. A too large hello time
parameter may result in normal links being regarded as invalid when packets drop occurred in
the links, which in turn result in spanning tree being regenerated. A too small hello time
parameter may result in duplicated configuration being sent frequently, which increases the
network load of the switches and wastes network resources. The default value is
recommended.
3. A too small max age parameter may result in the switches regenerating spanning trees
frequently and cause network congestions to be falsely regarded as link problems. A too large
max age parameter result in the switches unable to find the link problems in time, which in
Select Enable/Disable STP function globally on the switch.
Select the desired STP version on the switch.
STP: Spanning Tree Protocol.

RSTP: Rapid Spanning Tree Protocol.

MSTP: Multiple Spanning Tree Protocol.

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.
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.
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.
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.
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.
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.
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